titan 757 performance u-joint bellows for mercruiser alpha one, r, mr and some #1 replaces 60932a4 titan 757 performance new mercruiser u-joint drive shaft bellow oem quality aftermarket replacementincludes stainless steel clamps and ground clips exact item is pictured replaces mercruiser60932a4replaces glm89050replaces mallory9-72701replaces sierra18-2751 fits: mercruiseralpha gen 1 1972-1990fits alpha gen 1 units with ridge serial 3469428 amp; up