Perfect Fitment This AR2119 Gymatic 3/B series of unloaders mounting kit is specially for XM and RK series unloaders from Annovi Reverberi that operate at 3650 PSI and below. Direct Replacement Alternative to OEM gymatic mounting bolt kit AR-2119 both in function and performance. Perfectly works on various High Pressure Triples Plunger Pumps for AR North America, including pressure washer pumps, misting pumps and Blue Clean pressure washing equipment. Package Includes 1 x lower steel unloader bolt, 1 x upper unloader bolt, 4 x necessary seals. Superior Quality .