hook & loop Quality grade: 100% nylon,Grade A, Grade B & Grade C. Speicfication: 10mm to 150mm width, 25 meter or 27.5 yard Hook & Loop 1)Velcro can be made of many things,some was made of cotton,which proved to be impractical. Nylon and polyester are the fibers most commonly used now.2) Quality grade: 100% nylon,Grade A, Grade B & Grade C.3) Speicfication: 10mm to 150mm width, 25 meter or 27.5 ...