125 Piece rubber grommet kit. Contains 18 sizes of the most popular grommets. These are used in automotive sheet metal applications. The grommets feature an extra thick wall section to insulate and protect wires, cables, hoses, etc. from the sharp sheet metal edges . Kit is also great for home use This 125 piece Rubber Grommet hardware kit contains 18 of the most popular grommet sizes. All are included in a compact resealable plastic case.