These 4" x 3" x 2" inch white corrugated mailers are manufactured from ECT-32-B corrugated board and fold into a finished, sealed mailer in seconds. The one-piece self-locking design requires no tape, glue, or staples, making it practical for high-volume packing lines where consistent closure speed is a priority.

The self-locking fold creates double-wall thickness along the front and side panels, making these mailers well-suited for compact, damage-sensitive products such as cosmetics, supplements, specialty hardware, and small consumer electronics. E-commerce fulfillment centers and retail replenishment operations benefit from the clean white exterior, which accepts direct labeling or branded inserts without additional overwrap.

Each mailer weighs approximately 0.078 lbs, keeping dimensional weight impact minimal. Interior dimensions measure 4" L x 3" W x 2" H. Mailers are sold in bundles of 50 and ship via parcel carrier.