Renovate your semi with components with Expertise Built In , with the OTR 2.5" Round Open Back Grommet that offers improved wire, cable, and hose protection. This replacement ring neatly fits around the rim of a hole to prevent wires from being shredded, cut, or damaged. Engineered with an easy-to-install design that doesn't require any specialized tools. FleetPride is your First Click in Heavy Duty .