Constructed of durable 3-mil polyethylene to tackle a wide variety of applications Easily reclosable bags are especially effective in environments where gloves are worn. Slide-lock glides easily across the bag, protecting contents from dirt and moisture. Reusable and multifunctional. Sizes listed are the inside usable dimensions of the bag. 3-Mil Mini-Grip Slider Grip Poly Bags, 12in. x 15in., Box Of 250 is one of many Poly Bags available through Office Depot. Made by B O X Packaging.