New, never installed, OEM Stihl Unloader Injector Repair Kit. This is a true Stihl part and not a cheap aftermarket or knock off. According to Stihl this is used on their RB 400, RB 600, and RB 800 model pressure washers. As with any part, please make sure this will fit your exact year, sub model, and serial number before ordering. I am not responsible if it does not fit for you and it will still be yours. The Stihl part number is 4791 760 8800. Absolutely No Returns/No Refunds/No Excuses. Thanks for looking.