Attwood 11315-1 Boat Trailer Spool/Keel Polymer Roller, 4 Inches

Smooth, non-marring, resilient protection for the keel of your boat,Efficiently eases loading and launching your boat while helping to center your boat on the trailer,Durable, protective rollers are for heavy-duty use,Long lasting polymer construction makes it impervious to sunlight, chemicals and fuels,Fits 1/2" diameter shafts