carton staples: model:3215,3218,3515,3518,3522,etc carton staples:wire width and thickness:1.95x0.9(mm),2.25x0.87(mm)length:15-22mmcolor :copper coated or sliver (galvanized )Made of best galvanized steel wire, high strength and flash coatUsage: used for stitching of boxes and cartons,packing carton staple