Rubber grommet,rubber bushing:
1>Material:SBR,nitrile,EPDM,silicone
2>Durometer:60+/-5 shore A
3>Inside dimensions:9/32" and above
4>Applications:rubber grommets are used to protect or cover
through holes with rough 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 wire or cable installation