AR Pump Kit, Packing XTA, XTVManufacturers Part #AR1866The AR2520 Water Seal Kit is the Original Equipment AR replacement Seal Kit.This AR2520 Water Seal Kit consists of the following parts:3 x AR1260140 Support Ring Reducer Brass3 x AR1260141 Support Ring Reducer Plastic3 x AR1520120 Support Ring3 x AR1271650 High Pressure Packing3 x AR1260420 O-Ring3 x AR1260440 Low Pressure SealThe AR2520 was used on the Annovi Reverberi XT, XTA, XTV series pressure washer pumps also known as AR pumps and replaced old part # AR1866.