Rubber Grommets

Rubber grommets are rings that are placed around metal openings to protect objects or materials that pass through the opening. A normal use for grommets is for openings where wires pass through.

They are made of synthetic or natural rubber and are produced by various types of molding. Electrical cables are vulnerable to abrasions from the surface of a metal opening, which, when damaged, can short out the wiring. Rubber grommets prevent this and protect wiring.