{"product_id":"18x20-4-mil-white-block-reclosable-poly-bags-250-case","title":"18x20\" 4 Mil White Block Reclosable Poly Bags - 250\/Case","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003e18 x 20\" 4 mil reclosable poly bag, sold by the case of 250. Medium duty — better tear and puncture resistance for heavier components, hardware, parts kitting, and items with sharper edges. Sold by the case of 250.\u003c\/p\u003e\n\u003ch3\u003eSpecs at a glance\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct type\u003c\/th\u003e\n\u003ctd\u003eReclosable poly bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBag dimensions (W x L)\u003c\/th\u003e\n\u003ctd\u003e18 x 20\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFilm thickness\u003c\/th\u003e\n\u003ctd\u003e4 mil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eClosure\u003c\/th\u003e\n\u003ctd\u003eReclosable zipper-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eClear with white write-on block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHang holes\u003c\/th\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBags per case\u003c\/th\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eBest for\u003c\/h3\u003e\n\u003cp\u003eBest for warehouses, 3PLs, ecommerce kitting, parts rooms, jewelers, medical and dental practices, and retailers that need a sealed, labeled, and reusable container for small items.\u003c\/p\u003e\n\u003ch3\u003eWhen to use this product\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003eSmall parts, fasteners, components, samples, and SKUs that need to stay sorted and labeled.\u003c\/li\u003e\n\u003cli\u003eKitting and pre-packing where the bag will be reopened for assembly or QC.\u003c\/li\u003e\n\u003cli\u003eInventory counts, returns, and replenishment where the contents need to stay visible.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen to choose something else\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003eFor very sharp parts or long-term heavy storage, step up to 6 mil.\u003c\/li\u003e\n\u003cli\u003eFor light dry goods, 2 mil is more economical.\u003c\/li\u003e\n\u003cli\u003eFor larger volumes or non-resealable disposable use, browse the full \u003ca href=\"\/collections\/poly-bags\"\u003epoly bag collection\u003c\/a\u003e for flat poly bags and other formats.\u003c\/li\u003e\n\u003cli\u003eFor trash, recycling, or large-format liners, see the \u003ca href=\"\/collections\/bags-liners\"\u003ebags \u0026amp; liners\u003c\/a\u003e collection.\u003c\/li\u003e\n\u003cli\u003eFor UV-sensitive contents, choose an amber UV reclosable bag in the same size range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNeed help choosing?\u003c\/h3\u003e\u003cp\u003eNot sure if this size or thickness is right for your contents? Read the \u003ca href=\"\/pages\/poly-bags-guide\"\u003ePoly Bags Buying Guide\u003c\/a\u003e for a walkthrough of poly bag styles, mil ratings, and closure types, or use the \u003ca href=\"\/pages\/poly-bag-thickness-selector\"\u003ePoly Bag Thickness Selector\u003c\/a\u003e to match the right mil to your application.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does mil mean?\u003c\/strong\u003e\u003cbr\u003eMil is film thickness — 1 mil = 0.001 inches. This bag is 4 mil thick. Medium duty — better tear and puncture resistance for heavier components, hardware, parts kitting, and items with sharper edges. See the \u003ca href=\"\/pages\/poly-bag-thickness-selector\"\u003ePoly Bag Thickness Selector\u003c\/a\u003e for a side-by-side of all common mil ratings.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre these bags FDA-compliant for food contact?\u003c\/strong\u003e\u003cbr\u003eThese are general-purpose LDPE reclosable bags. They are commonly used for non-food parts, hardware, samples, and storage. For direct food contact, confirm food-grade certification with a sales rep before ordering — not all reclosable poly bags are FDA-compliant.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the white block for?\u003c\/strong\u003e\u003cbr\u003eThe printed white block on the front of the bag accepts pen, pencil, or marker writing. It is used for SKU labels, lot numbers, dates, QC notes, batch IDs, or short instructions — much faster than applying a separate label for in-house tracking.\u003c\/p\u003e\n\u003ch3\u003eRecommended add-ons and related links\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBrowse the full \u003ca href=\"\/collections\/poly-bags\"\u003epoly bag collection\u003c\/a\u003e for adjacent sizes and mil thicknesses.\u003c\/li\u003e\n\u003cli\u003eSee the broader \u003ca href=\"\/collections\/bags-liners\"\u003ebags \u0026amp; liners\u003c\/a\u003e category for can liners, gusseted bags, and other poly formats.\u003c\/li\u003e\n\u003cli\u003eFor protecting fragile contents inside the bag, pair with \u003ca href=\"\/collections\/cushioning\"\u003ecushioning \u0026amp; void fill\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- packrift-enriched --\u003e\n\u003cdiv class=\"packrift-enrichment\"\u003e\n\u003csection class=\"pf-best-for\"\u003e\u003ch3\u003eBest For\u003c\/h3\u003e\n\u003cp\u003eUse for food manufacturers, distributors, and parts suppliers who need FDA\/USDA-compliant storage without additional labeling costs. The 18 x 20\" 4 mil white block reclosable poly bags combine durability with convenience, offering a writable surface for inventory tracking while maintaining product integrity during storage and transit.\u003c\/p\u003e\n\u003cp\u003eThe 4 mil thickness delivers puncture and tear resistance for demanding warehouse environments, while the integrated white write-on block eliminates separate label requirements and reduces prep time. Durable LDPE construction with a reliable reclosable zipper ensures products stay fresh and secure, meeting all food contact compliance standards for regulated industries.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"pf-specs\"\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eLow-Density Polyethylene (LDPE), 4 Mil thickness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e18 x 20 inches (usable interior dimensions)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eClosure Type\u003c\/th\u003e\n\u003ctd\u003eReclosable zipper with white write-on block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCompliance\u003c\/th\u003e\n\u003ctd\u003eFDA and USDA food contact approved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRecyclable\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"pf-use-cases\"\u003e\u003ch3\u003eCommon Use Cases\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFood storage and ingredient packaging with FDA\/USDA compliance requirements\u003c\/li\u003e\n\u003cli\u003eParts and hardware organization with write-on inventory identification\u003c\/li\u003e\n\u003cli\u003eProduct protection during shipping and warehouse storage\u003c\/li\u003e\n\u003cli\u003eBulk quantity packaging for resealable retail or wholesale distribution\u003c\/li\u003e\n\u003cli\u003eMoisture and contamination protection for sensitive materials and components\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\u003csection class=\"pf-included\"\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eCase of 250 reclosable white block poly bags (18 x 20 inches)\u003c\/li\u003e\u003c\/ul\u003e\u003c\/section\u003e\u003csection class=\"pf-shipping\"\u003e\u003ch3\u003eShipping and Packaging\u003c\/h3\u003e\n\u003cp\u003eShips via standard ground freight in manufacturer cartons. Each case of 250 bags is densely packed for cost-efficient shipping while maintaining product quality and zipper integrity upon arrival.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"pf-faq\"\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdetails\u003e\u003csummary\u003eAre these bags FDA approved for direct food contact?\u003c\/summary\u003e\u003cp\u003eYes, these 4 mil white block reclosable poly bags meet FDA and USDA requirements for food contact applications, making them suitable for food storage, ingredients, and packaged goods destined for retail distribution.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I write directly on the white block without pre-labels?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The integrated white write-on block is designed for pen, marker, or label gun application, eliminating the need for separate labeling and reducing your per-unit packaging costs and prep time.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat makes 4 mil thickness different from thinner poly bags?\u003c\/summary\u003e\u003cp\u003e4 mil LDPE provides puncture resistance, tear strength, and durability compared to 1-3 mil bags. This means fewer damaged shipments, longer shelf life during storage, and reduced waste—critical for industrial and food supply operations.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eAre these bags resealable multiple times?\u003c\/summary\u003e\u003cp\u003eYes, the reclosable zipper closure is designed for multiple open-and-close cycles without loss of integrity, allowing customers to access contents repeatedly while maintaining freshness and security throughout the product lifecycle.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c!-- \/packrift-enriched --\u003e\n\n\u003c!-- packrift-pdp-link-enrichment:v1:start --\u003e\n\u003cp class=\"packrift-pdp-links\" style=\"margin-top:1.25em;font-size:0.95em;color:#222\"\u003e\u003cstrong\u003eRelated guides \u0026amp; tools:\u003c\/strong\u003e \u003ca href=\"https:\/\/packrift.com\/pages\/18x20-poly-bags\"\u003e18X20 Poly Bags\u003c\/a\u003e\u003c\/p\u003e\n\u003c!-- packrift-pdp-link-enrichment:v1:end --\u003e\n","brand":"Packrift","offers":[{"title":"Default Title","offer_id":53437354344816,"sku":"PB4013","price":107.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1004\/9159\/2048\/files\/PB4013.jpg?v=1774843458","url":"https:\/\/packrift.com\/products\/18x20-4-mil-white-block-reclosable-poly-bags-250-case","provider":"Packrift","version":"1.0","type":"link"}