This kit contains the most commonly needed parts to rebuild your Crown Head Standard Above waterline (earlier)model. style units only. CHRK OVERHAUL KIT CONTENTS:(1) 1234 Bowl Gasket White Neoprene. (1) CH11 Pump Shaft Seal. (1) CH117W Flapper Valve Assembly. (1) CH12 Check Ball (1) CH25 Front Cover O Ring. (1) CH37E Siphon Check Valve. (1) CH57 Rubber Slinger. (1) CH59 Seal (1) CH7A Pump Gasket. (1) CH8 Check Valve Spring. (1) CH91 Round Rubber Gasket. (1) G13 Pump Impeller. (2) G15 Teflon Impeller Washers. (1) G4 Plug Washer. (2) M13 O Ring. (4) RNI Nylon Shoulder Washer.