A rubber grommet is a type of mechanical fastener made of rubber material that is used to protect, insulate, and secure various types of cables, wires, and hoses passing through a hole or an opening in a surface. The grommet is designed to reduce vibration and abrasion, as well as to prevent the wires or cables from being cut or frayed by the sharp edges of the hole.Rubber grommets come in various shapes, sizes, and designs depending on their intended use. Some common types of rubber grommets include oval grommets, round grommets, and split grommets. They are widely used in a variety of industries, such as automotive, aerospace, electronics, and construction, among others.