Boxes feature rigid cardboard construction with 2 wire tabs that come up from bottom half, fit through top, and fold over to secure it. Strong and lightweight, they can be supplied with precut open- or closed-cell foam inserts to cradle and protect fragile products such as medical vials, bottles, and optics during shipping and storage. Manufactured in sizes from 1-7/8 x 1-7/8 x 9/16 in. up to 18 x 13 x 3-1/8 in., boxes provide burst strength of 150 lb/in2 per Federal Spec. PPP-B-676-d, can be tamper-evident, include full color printing, and are reusable and recyclable.