Polaris (Booster Pump) Mod: PB4-60 (POL001) Shaft Seal & O-ring Rebuild Kit. SAVES YOU MONEY! TORK BRAND parts, THESE ARE NOT OEM PB4-60 Polaris Booster pump shaft seal and o-ring rebuild kit offers perfect fit, high quality generic products This Kit fits: Dec 1, 2011 and prior PB4-60 Polaris Booster Pumps NOTE: Will NOT fit Polaris PB4-60 Booster Pumps with Serial Numbers beginning with "PB" and a manufacturing date on or after Dec 1, 2011. Fits PB4-60, 3/4 hp Booster Pump with serial number M12011001 and before. ATTENTION BUYERS, PLEASE READ AD DESCRIPTION BEFORE BUYING KIT! Volute O-ring, drain plug oring, Pump Shaft Seal Replacement,