Wonwopn 3 Inch 4Inch Boat Trailer Roller Assembly Bow Stop Bell Roller with 1/2 Inch Shaft, 3 Inch Roller fits 3 Inch Bracket, 4 Inch Roller fits 4

Wonwopn 3 Inch 4Inch Boat Trailer Roller Assembly Bow Stop Bell Roller with 1/2 Inch Shaft, 3 Inch Roller fits 3 Inch Bracket, 4 Inch Roller fits 4

Overall dimensions (with bells): 5 inch width x 4 inch roller. Inner roller is 3 inch wide. Attachment bolt is 1/2 inch. 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. Specs:

Application: 3" wide center roller bracket
Dimensions (with bells): 6" long x 4-1/8" diameter
Shaft diameter: 1/2"

Features:

Polyurethane construction is non-marring and good
Stronger and longer lasting than rubber
Bow roller assembly replaces the bow roller, end bells, shaft, and hardware on your boat trailer
Absorbs road shock while your boat is being towed
End bells ensure that your boat does not scrape along bolts or roller bracket
Eases loading and unloading of your boat
Supports the front of your boat as it rests on your trailer
Won't leave scratches, scuffs, or marks on your boat's hull
Works great in freshwater and saltwater