This 4 x 3 x 2 inch kraft corrugated mailer is built from ECT-32-B single wall corrugated board and uses a one-piece self-locking construction that folds into a finished mailer in seconds — no tape, glue, or staples required. The folding geometry creates double wall panels along the front and sides, adding structural rigidity precisely where transit impacts are most likely.

The compact format suits e-commerce sellers shipping small accessories, medical device distributors sending samples or components, and manufacturing operations packing finished hardware or electronic parts. The interior accommodates items that would be over-boxed in standard small RSCs, reducing material cost and dimensional weight on every shipment.

Each mailer weighs approximately 0.078 lbs and ships flat, keeping storage footprint minimal at packing stations. Bundles of 50 make bench-level restocking practical without large inventory commitments.