17 x 21" Black Self-Seal Stayflats Plus Mailers (Case of 100)

• Dimensions: 17" x 21" exterior
• Material: .028 Chipboard
• Quantity: 100 mailers per case
• Weight: Approximately 63.94 lbs per case
• Shipping: Ships via parcel

Stayflats Plus® Black Self-Seal Mailers measure 17 inches wide x 21 inches long and maintain a flat, rigid profile throughout transit using built-in lightweight chipboard construction — no separate stiffeners required. The opaque black exterior conceals contents during handling and delivery, adding a layer of discretion not available with standard kraft mailers.

These mailers are well suited for e-commerce apparel shipments, print-on-demand fulfillment, photo and fine art reproduction, and retail distribution of flat goods such as posters, calendars, and documents. The self-adhesive peel-and-seal closure requires no moisture activation, and a pull-tab tear strip allows recipients to open the mailer cleanly without cutting tools or risk of damaging contents.

Each case contains 100 mailers. The peel-and-seal strip creates a tamper-evident bond once sealed, making the mailers appropriate for customer-facing shipments where presentation and security matter. Cases ship via parcel carrier.