You are bidding on a Ford Rotunda OTC Diesel Injector Seat Cleaner T83T-9527-A / 303-232. Seat Cleaner is in overall very good condition. Info Carbon build up on the injector seat surface prevents proper seating. To make sure the replacement injector is installed correctly, you have to be sure the carbon has been cleaned out of the seat. The best way to get a thorough cleaning is w/ this tool. Applications include: Navistar 6.9L 7.3L / 7.3L : F-Super Duty 250-550 .