This Haltech firewall rubber wiring grommet measures 51mm (2 in.) outer diameter and 28mm (1 1/8 in.) inner diameter. It’s intended to protect and seal wiring as it passes through a firewall or bulkhead, reducing abrasion and helping maintain a clean routed harness where a 28mm wiring pass is required.
Haltech Firewall Rubber Wiring Grommet - 51mm (2in) OD 28mm (1-1/8in) ID