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The BSC PREFERRED M433 is a self-sealing corrugated mailer designed for shipping small, lightweight fragile items without tape, glue, or staples. Manufactured from 200/ECT-32-B white corrugated board, each mailer folds to create double walls of protection on the front and sides, providing crush resistance during transit. The lightweight construction helps keep postage costs low while still delivering reliable structural integrity. Each pack contains 50 mailers, making it a practical choice for shipping departments, fulfillment operations, and businesses with consistent small-parcel outbound needs.
The M433 mailer is suited for residential and commercial shipping applications where protecting small, fragile items is a priority. Its self-closing design speeds up packing workflow by eliminating the need for additional sealing materials. Typical use cases include e-commerce order fulfillment, parts distribution, and retail mail-order operations. The white exterior also provides a clean presentation for outbound shipments.
Designed as a direct equivalent to part number S-417. Suitable for general small-parcel and fragile-item mailer applications.
No tools are required to assemble or seal the M433 mailer. Fold along the pre-scored lines and close the self-locking flap before placement in outbound shipping. Ensure contents are properly cushioned inside the mailer before sealing to maximize crush-resistance performance during handling and transit.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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