These PVC Roller End Caps are a great choice for Boat Trailers which need additional protection outside of the Roller Bracket Arms in order to prevent damage to their boat's hull or Bow. You would use this Blue Roller End Cap instead of a PVC Roller End Bell with your Trailer's Bow Roller if you want that added width of Roller space but don't necessarily need the Deeper "V" shape that's given when using bells. This End Cap will fit a 4 inch wide Bow Roller, or a 5, 8, 10, 12 inch Boat Trailer Keel Roller because it matches up to the 3 1/2 inch Roller Diameter that all of those sizes have.
Will not Dry Rot, or mark your boat
Durable Blue Polyvinyl Construction
1/2 inch bore
Matches the 4 inch Blue PVC Bow Roller or the 5, 8, 10 or 12 inch Blue PVC Keel Rollers
3 1/2 inch diameter x 1 1/2 inch thickness