The closed cable tie connector ring in black is made of heat-stabilized nylon 6.6, which increases mechanical strength, heat and wear resistance, and stiffness. It is 0.57" long x 0.36" wide (14.5 x 9.1 mm) and is used with miniature, intermediate, standard, heavy-standard, and light-heavy cable ties. It is designed for outdoor environments and comes in packages of 1000. .. see full description