hook and loop, hook and loop magic tape, hook and loop velcro, hook and loop fasteners Material:A grade20% nylon and 80% polyesterAA grade50% nylon and 50% polyesterAAA grade100% nylon Normal sizes: 16mm, 20mm, 25mm, 30mm, 40mm, 50mm, 60mm , 80mm , 100mm , 120mm , 140mm , 160mm Color: any color, and all colors packing , according to customer request. hook and loop