Fits the following pumps: Cygnet Series - All Horsepowers J, JCM, K and KM Series - All Horsepowers L, LC, LCUN2, LT, LX, LTC, LCU, LTCU, LCM, ULCU, ULTCU Models - All Horsepowers L3 and L25 Models - All Horsepowers LH and LTH Models - All Horsepowers LR,LR9, LR3, LR6, and LR25 Models - All Horsepowers Magnum, Magnum Plus, and Magnum Force Models - 0.5hp to 3.0hp Ring-Lok P, PC and EP Models - 0.5hp to 1.0hp Ring-Lok R, P, PC and UP Models - 0.5hp to 1.0hp RC Model -0.5hp to 1.0hp