Materials: the rubber wire grommet is made of rubber which is flexible and durable, has excellent insulation and can effectively protect the electrical wire. Complete Protection: Place rubber grommets in the metal panel to prevent metal-to-metal contact and protect the wiring.In addition, the rubber grommet protects the cable from chemical substances. Applications vary: Rubber grommet can be used in cars, boats, cylinders, valves, water pipes, etc.It is an ideal tool for repairers, movers and decorators.In addition, the matching rubber grommet can effectively cable and maintain aesthetics. Bulkhead gasket in 8 sizes: 180 pcs in total, 5/8" (5pcs), 7/8" (5pcs), 1" (5pcs), 1/2" (20pcs);7/16"(25pcs) 1/4"(40pcs), 5/16"(40pcs), 3/8"(40pcs), to meet your different needs. Easy to Use: With O-type design and easy-click bite hole, just press the rubber grommet into the plate hole to use it.It also comes with a box for easy transport and storage.