... , nitrile, EPDM, silicone 2) Durometer: 60+/-5 shore A Rubber grommet, rubber bushing:1) Material: SBR, nitrile, EPDM, silicone2) Durometer: ... protect or cover through holes withrough edges. The rubber grommet can shield the wire or other material from any ... damage. The rubber grommet also adds a neat, clean look to any professional wireor cable installation Rubber Grommet/Bushing