1958-1962 Corvette Grommet Cowl 4 Port
This Firewall Grommet Has A Maximum Flange Diameter Of 1 7/16 Inches

It Is Designed To Fit Into A Hole 1 1/8 Inches In Diameter.

Panel Thickness = 1/8

4 Hole'S Diameters = 1/8

This Grommet Is Split 4 Ways To Allow Insertion Of Wires And Lines From The Side Of The Grommet