The Giant Pumps 7755 is a new gasket ring for GP and LP series pumps. Fits GP5132, GP5132-SSP, GP5136, GP5142, GP5145, GP5120, GP5122, GP5124, LP122A, LP123, LP255, LP121A, LP121A-0011, LP200, LP250, LP250W-MT, LP121A-5100, LP200-5100, and LP250-5100. Constructed with copper. A genuine OEM Giant Pumps part. This manufacturer factory part ensures a proper fit and it is constructed with the correct materials.