Bushing Feedthrough black RG6 coaxial cable for Coaxial Cable Wire installation, service or repair. These durable, UV-Stabilized, maded from ABS, PP plastics,The size of Hole Dia. 7mm X 31mm Head Dia. X 30mm Length,used for weather sealing a cable entry through a wall. Best if used with silicone to prevent moisture penetration used in the cable wire industry fields.