CLAMP DIAMETER 3.50" LENGTH SHORT 61.5 303507-08 This clamp adaptor is 3.50" diameter with a short length providing a clamping location for your magneto.

CLAMP DIAMETER 3.50" LENGTH STD 85.26 303507-07 This clamp adaptor is 3.50" diameter and standard length providing a clamping location for your magneto.

CLAMP DIAMETER 3.625" LENGTH STD 53.18 303507-09 This clamp adaptor is 3.625" in diameter.