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- The master box includes 4, 10 or 15 insulated containers.
- This insulated container fits as an insert into USPS Medium Priority Flat Rate Box.
- Fits perfect! Great for keeping things warm or cold. This only includes the styrofoam box and not the cardboard box provided by the US Post Office.
- Perishables and other temperature sensitive items (such as chocolates, cakes, burgers, sausages, flowers, or medications) can be mailed at a flat rate in a temperature controlled environment.
- The Styrofoam is made of Expanded Polystyrene Foam (EPS).
- Temperature Sensitive.
- Waterproof / Leakproof.
- Locking Lids.
- Outside Dimensions: 11 x 8 1/2 x 5 in
- Inside Dimensions: 9 1/2 x 7 x 3 3/8 in
- Wall Thickness: 3/4" in