About this product 8 Sizes There are 8 sizes of rubber washers: 3/8 , 1/4 , 5/16 (40 pieces of each), 7/8 , 5/8 , 1 (5 pieces of each ), 1/2 (20 pieces), 7/16 (25 pieces), which can meet your various usage needs. ApplicationWith various sizes, the rubber open grommet is for wiring repair, chassis hole, electrical firewall cable protection. It can prevent metal on metal contact thus protecting wiring, cables, suitable for automobiles, RV wiring work, marine uses, leaky faucets, hose repair, etc. Quality. Made of flexible and durable rubber, these rubber grommets are non-toxic, anti-corrosive and have uniform wall thickness, good elasticity and toughness, heat resistance ability and sunlight resistance, which can protect cables, wires, wires from possible mechanical or chemical attack. Features It is designed to be O-rings for easy installation, you can click quick-fit drill holes, the sealing rings will fit into those holes accurately and efficiently. It can also create a neat appearance on furniture and electrical boxes. StorageThe package includes 180 pieces of rubber washers and a handy plastic zip case, which is easy to store, transport and use. It is a good tool kit for repair shops, electricians, removers, handymen, plumbers. _x000D_