All Berry's Ammo Boxes are made from high impact polypropylene for increased strength against cracking, chipping, warping, expansion, or contraction. These Model #150 10 round slip-top boxes include side grooves that grab the top securely and allows you to adjust the lid to the desired length. They are translucent and stackable, they carry a lifetime warranty, and they are made in the USA. Available in Smoke and Clear colors Length adjustment: 4-5/8 to 6-5/8" long #150 Ammo Box Dimensions: 6.72" oal x .82"