Hayward SP0710XR50 Hayward O-Ring/Teflon Shaft Seal, For Use With: SP0710/SP0710X/SP0711/SP0712 1-1/2 Inch Vari-Flo(TM) Valves, SP0715/SP0716 2 Inch Vari-Flo Valves and SP0714T Vari-Flo(TM) XL Valve