These flexible fishing rod grommets / utility grommets / rigging grommets have many uses, top among them are fishing rod tips/butts and as a pass-throughs for wires/cables.
The Utility Grommet is molded of tough, flexible, vinyl. It is designed for multiple uses in boats, such as cable pass-throughs, landing net holders, fishing rod supports or protectors, stern light holders or any number of other uses. For a bulkhead pass-throughs, simply mount and run cables, wires, etc. through to prevent chafing. For land nets, fishing rods, stern lights or other items, simply mount and insert items to be protected or held in place. To remove items from utility grommet, simply pull. This utility grommet can be used either horizontally or vertically.
Material : Marine grade vinyl.
Size :   3 -3/8″ OD or  4″ OD.