We supply a wide range of rubber grommets open, blind and semi blind. Open grommets are used to protect cables or pipes passing through metal or grp panels, various industrial and anti- vibration applications. Blind grommets are used for blacking holes in metal or grp panels. for measuring for the right sized grommet, please mention: 1. Panel hole 2. Panel thickness 3. Cable hole 4. Overall thickness 5. Overall diameter.