Molded of tough, flexible, vinyl. It is designed for multiple uses in boats, such as cable pass thru, landing net holder, fishing rod support or protector, stern light holder or any number of other uses. For bulk head pass-thru, simply mount and run cables, wires, etc. through to prevent chafing. Grommet can be used either horizontal or vertical. Install with (4) pan head screws (not furnished). Hole 2-3/8" OD 3-3/8" Color Black Pack 2