In stock SKU RM1721BKGTIN 841436080880

17x21 Black Self-Seal Chipboard Mailers 100/Case

Professional black self-seal stayflat mailers sized 17x21" protect documents and photos during shipment without additional stiffeners. Engineered from .028 chipboard with peel-and-seal closure and easy tear strip. Lightweight design reduces freight costs–sold by the case of 100 units.
$209.30 / case of 100$2.09 per mailer
= 100 mailers · Item subtotal $209.30

Before shipping and tax. Final discounts and total are confirmed in the cart.

Request bulk pricing
Volume pricing — applied automatically in the cart
Quantity (case)Item-subtotal discount
1–2Base item price
3–53% off qualifying item subtotal
6+5% off qualifying item subtotal

In stock · ships within 1 business day from the nearest of 5 US warehouses (IL, PA, TX, GA, CA) · 1–5 business days in transit · freight calculated at checkout · free ground shipping on orders over $99 (parcel rates up to $29.95) and over $500 (up to $120)

30-day returns on stock items · Return policy

Inside dimensions 17" × 21"
Board / material .028 Chipboard
Color Black
Freight class Class 60

Specifications

Inside dimensions17" × 21" (L × W)
Board / material.028 Chipboard
ColorBlack
Sold asCase of 100
Physical units per order increment100 (one case)
Case weight63.94 lb
Outer carton (shipping)24.25 × 17.5 × 10.25 in
LTL freight classClass 60
GTIN841436080880
SKURM1721BK

About this item

SKU RM1721BK — 17" × 21", .028 Chipboard, Black. Sold as a case of 100, shipped from US warehouses.

The 17x21" Black Self-Seal Chipboard Mailers - Puncture Resistant is a rigid chipboard mailer for photos, prints, documents, calendars, certificates, and flat items that should not ship in a soft envelope. Listed specs include size 17" x 21"; chipboard material; case of 100. Use it as a mailing envelope, poly mailer, padded mailer, or flat document shipper when the item fits the listed size.

Nearby exact-spec options

Use these when the size, material, pack quantity, or workflow is close but not identical.

Ship photos, documents, and sensitive items with confidence using these 17x21" white self-seal stayflat mailers. Made from rigid .020 chipboard that requires no additional stiffeners, these peel-and-seal mailers offer professional protection at lightweight cost savings. 100 mailers per case with pull-tab tear strip for effortless opening.same size option 17x21 White Self-Seal Chipboard Stayflats Plus Mailers 100/Case SKU RM7PS · CASE $145.24Protect oversized prints and documents with these durable 22 x 17" kraft jumbo envelopes. Made from 28 lb. kraft paper stock with ungummed flaps for cost-effective reuse. Flat storage design and bulk case pricing make them ideal for high-volume mailrooms and shipping operations.nearby size option 22x17 28 lb Kraft Jumbo Envelopes 100/Case SKU EN1084 · CASE $71.54Ship oversized documents, prints, and flat items with our 20 x 15" kraft jumbo envelopes. Ungummed flaps enable reuse, reducing packaging costs. 28 lb. paper stock provides durability for mailroom and warehouse operations–100 envelopes per case.mailer size alternative 20x15 28 lb Kraft Ungummed Jumbo Envelopes 100/Case SKU EN1082 · CASE $67.18Ship with confidence using these 20x14.5 nylon reinforced mailers designed for e-commerce brands. Heavy-duty nylon fibers deliver superior tear resistance without the weight penalty–perfect for cost-effective shipping. Each case includes 250 mailers ready to tape or staple.mailer size alternative 20x14.5 Heavy-Duty Reinforced Mailers 250/Case SKU B890 · CASE $307.66

Frequently bought with

Light add-ons for this order: tape, labels, dispensers and packing-list envelopes.

Common questions

Is this the right mailer for my order?
Use 17x21" Black Self-Seal Chipboard Mailers - Puncture Resistant, Case of 100 when your item or workflow matches small shipments where the item fits the listed usable mailer size and does not require a carton. Check the live product page against your needs before ordering.
What specs should I confirm before checkout?
Confirm usable size, material, cushioning, closure, and case quantity. This listing is summarized by size: 17 x 21 in; material: paper; quantity: Case of 100. Use the current SKU, variant, price, availability, and delivery options shown on the product page.
Can I request this for a larger or repeat order?
Yes. For larger quantities, mixed-SKU orders, or recurring supply, send Packrift the product link or SKU, quantity, delivery ZIP code, receiving notes, and timing.
How should I plan delivery for this item?
Delivery options and timing are shown at checkout based on the item, quantity, and destination. For larger, freight-sensitive, or mixed-SKU orders, request a quote before placing the order.

Order support

Questions on specs or freight?

Send the SKU, quantity, and delivery ZIP and we will confirm specs, availability, and freight before you order.

+1 (302) 216-2975 support@packrift.com Mon–Fri, Eastern Corrugated buying guide →