C.H. Yates Rubber 440R 4" Marine Rocker Roller with 3/4" Shaft
Ribbed Wobble Roller - BlackDesigned to wobble back and forth, to automatically adjust to the contours of your boat. Length: 4-1/4"Outside Diameter: 4-1/4"Shaft: 3/4" " alt="C.h. Yates"