Gas engine flange and hollow shaft that fits most horizontal shaft engine. Aaa 11.6ga13 pressure washer pump 4200 psi @ 4.0 gpm fits dxpw4240 the seller is toolbarn and is located in carter lake, iowa. Pump Oil Capacity 11 fl oz. Flang Bolt Pattern SAE J- 609A. Kit Inlcudes Siphon mounting bolts.