YOU ARE PURCHASING AN ALL PLASTIC,NON-RUST, CHUNKY, HEAVY DUTY 39CM - 15" OPEN END ZIP IN BLACK WITH A WIDE, SOLID, SUPER CHUNKY No:10 WEIGHT (10MM) SLIDER AND PLASTIC TEETH MADE BY SLIK. THIS IS A HIGH QUALITY ZIP, MADE IN THE UK, PERFECT FOR SEWING NEEDS, JUMPERS, JACKETS, TROUSERS, WETSUITS, BAGS, COATS, CAMPING AND ARTS AND CRAFTS!