3 inch polyurethane bow roller with bells and bolt - 1/2 inch bore.Overall width is 5 inch. This assembly includes the 3 inch bow roller, the 2 bells, and 1/2 inch diameter bolt to mount the assembly.
This product is thermoplastic polyurethane elastomer(TPU), is one of polyurethane types. From the process, thermoplastic type used the injection type craft.
Will not rust or will not mark your boat,will not flat spot.
Designed to support the weight of your boat on the trailer; absorbs road shock.
End bells ensure that the boat does not scrape against bolts or roller bracket.