Specification Brand : Tool Daily BulletPoint1 : Pressure Washer Soap Injector Kit, compatible Pump 190593GS, 190635GS and 203640GS. Please identify the part number of pressure washer pump, then check if it fits your pressure washer. BulletPoint2 : 1/8’’ -27 male BSP thread. BulletPoint3 : How to replace: Follow soap hose to end and you'll find injector. Take off soap hose. Use wrench to remove old injector. Clean out any gunk or dried soap in receptacle. Make sure rubber o ring is on injector as pictured. Put ball bearing inside injector and then the spring with small end of spring against the ball bearing. Insert injector into receptacle and tighten injector with 13mm wrench. Don't overtighten, you'll break the o ring or crack white metal on pump. Put the soap hose back on. BulletPoint4 : If the part on your pressure washer part is worn-out, rusted or hard-water-deposit clogged, you can replace it with this set. BulletPoint5 : Package List: Two Chemical Injector Sets, including 2 Brass Barbs, 2 Check Valve Balls, 2 Springs, 4 O-Rings. Color : Silver ExteriorFinish : Brass ExternallyAssignedProductIdentifier1 : 852967008670 ExternallyAssignedProductIdentifier2 : 0852967008670 ItemName : Tool Daily Compatible Chemical Injector Set for Pressure Washer, Replacement for 190593GS 190635GS 203640GS ItemPackageDimensions_Height : 12.8016 centimeters ItemPackageDimensions_Length : 0.508 centimeters ItemPackageDimensions_Width : 10.16 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : pressure-washer-accessories ItemTypeName : AUTOBABA Pressure Washer Pump Head Assy, Compatible with AR42940 AR Pump-SRMW2.2G26/ RMW2.2G24 Pump Head AR42518 AR43061 AR42940 Replacement Kit Manufacturer : Tool Daily Material : Brass MaximumFlowRate : 2.5 gallons_per_minute ModelName : RYB011 ModelNumber : RYB011 NumberOfBoxes : 1 PartNumber : BLKBR-181 PowerSourceType : manual, Ac dc ProductDescription : This Chemical Injector Set fits below pressure washer.