Seachoice Spool Roller 4"x1/2" Black 50-56140 by Seachoice $6.22 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Seachoice Trailer Spool Roller 4" x 1/2" Black #50-56140 Non-marking black rubber with plastic sleeve.