Western Plow Part # 44352 - Top Retainer Ring is found on the pump cover kit # 44325 which is for the MVP3 and MVP Plus v plows from Western. This is just the top retainer ring for that kit. This ring can sometimes get folded over, crack, tear, or otherwise to the point where you won't have a good seal when closing up the pump cover itself. Rather than buy the entire kit, buy a new retainer ring and solve your problems.