First Aid Supplies in Waterproof Box. Assembled in USA. Flambeau Waterproof Box #4001 Keeps Supplies Dry and Secure Includes Outdoor First Aid Supplies Measures 9 5/16 x 5 13/16 x 1 1/4 inches This Waterproof first aid kit by MFASCO is packed in a heavy-duty, Flambeau TuffTainer box that has a rubber seal and 3 tight-sealing latches, giving you a completely waterproof box that keeps your supplies dry and ready to use in the event of an emergency.