Package of 50 pieces Open Position Diameter- 2-1/8" Closed Position Diameter- 1-7/8" to 2" Mounting hole 3/16" Cable Clamp Color | Black Our "P" Style cable clamps are made out of nylon plastic. These cable clamps are molded in an open "V" position and are screwed closed to securely hold your cables and hoses in place. Each Cable Clamp has a mounting hole that fits a standard No. 10 screw (.203") and can be mounted on any surface. Due to the smooth edges and flexible nylon construction, the clamps will not cut, bend, or crush your wires and / or hoses making them more appealing than metal clamps. Using a nylon cable end clamp on metallic tubings, like copper or aluminum, eliminates the possibility of galvanic corrosion at such contact points.