These Case-Gard ammo boxes are made of virtually indestructible polypropylene that will not warp, crack, chip, peel, expand or contract. Each box holds 50 rounds in individual compartments. The mechanical hinge and Snap-Lok latch protect contents from accidental spilling while the textured finish makes it easy to grip and scratch-resistant. Each Case-Gard R-50 series ammo box is supplied with a load label for recording load and sight data.