【Size】 : 2-3/4" / 70 mm Inside Diameter, 3-3/16" / 80 mm Drill Hole, 3-35/64" / 90 mm Outside Diameter, 3/32" / 2.5 mm Groove Width, 25/64" / 10 mm Total Thickness 【Material】 : Flexible Synthetic Rubber, Non-toxic and Tasteless, Strong Insulation Protection Function, Dust-proof and Flame-retardant 【Features】 : Keep wires or any other materials from rubbing against metal, Run wires through frame, firewall, sheet metal and other applications. 【Installation】: Easily cut the diameter of the Rubber Grommet, then snap directly into the drill hole. 【Package Includes】 : 4 Pcs x Rubber Grommet Our grommets help protect wire and cable from sharp metal edges as well as eliminating the risk of wire, cord or hose chaffing on applications due to metal drill holes or cutouts. Each rubber grommet is flexible and enables simple installation by easily snapping the rubber grommet directly into the drill hole. The rubber grommets ensure your wiring projects and applications are sustainable and protected.