This is a "flush" style Poly Vinyl Blue Trailer End Cap for your Boat Trailer's Center Line Rollers or Bow Catch Rollers. This 3.5 inch size is a perfect match for all the common size rollers, including the 4 inch Boat Trailer Bow Roller, or the 5 inch, 8 inch, 10 inch or 12 inch Boat Trailer Poly Keel Rollers. These Blue PVC Roller End Caps are sold individually so that you can replace one side if it becomes damaged or lost, if you are making your own Boat Trailer Roller Assembly though you would typically want 2 end caps and a roller. Be sure to select a longer Roller Shaft or Trailer Bolt to accommodate for the added width of the assembly after the end bells.
3 1/2 inch diameter x 1 1/2 inch thick
1/2 inch bore
Matches the 4 inch Blue PVC Bow Roller, or the 5, 8, 10, or 12 inch Blue PVC Keel Rollers
Doesn't mark or scratch your boat