MATERIALS: These rubber grommets are made from durable, lightweight, heat, mineral oil and wear resistant rubber. absorbs energy and reduces vibration, not easy to break, to prevent wear of the workpiece surface and extend the service life of the equipment.PACKAGE INCLUDED: Eyelet 40 x 1/4", Eyelet 40 x 5/16", Eyelet 40 x 3/8", Grommet 25 x 7/16", Grommet 20 x 1/2", Grommet 5 x 5 /8", Grommet 5 x 7/8", Grommet 5 x 1". These rubber grommets are organized in a quick-closing PVC case for easy transport and storage.FUNCTION: They are designed to protect wires, cable pipes from the sharp edges of the sheet metal.ADVANTAGE: Compared with metal materials, rubber grommet does not cause magnetic problems in various industrial activities. Electrical insulation and effectively increases damping. Suitable for plumbing applications and as buffers and packers during engineering tasks.WIDE APPLICATION: These rubber grommets are suitable for pipes, hydraulic, pneumatic, gas and many other industrial applications. Product Description Descriptions: These Rubber grommets are suitable for pipes, hydraulic, air, gas and many other industrial applications. They are designed to protect wires and pipes from the sharp edges of sheet metal. Features heat resistant, mineral oil and wear. Features: These rubber grommets are suitable for hoses, hydraulics, air, gas and many other industrial applications . They are designed to protect wires and pipes from the sharp edges of sheet metal. Includes through-hole grommets in 8 sizes (see list images). Resistant to heat, mineral oil, wear. These rubber grommets are organized in convenient PVC cases for transport and storage easy. Specifications: Material: rubber Color: black Size: 1/4", 5/16", 3/8", 7/16", 1/2", 5/8", 7/8", 1" Weight: 219g Package includes: Eyelet 40 x 1/4" Eyelet 40 x 5/16" Eyelet 40 x 3/8 " Eyelet 25 x 7/16 " Eyelet 20 x 1/2 " Eyelet 5 x 5/8 " Eyelet 5 x 7/8 " Eyelet 5 x 1 "