Designed for cleaning the diesel injector sleeve, seat and bore. Injector Seat And Shaft Cleaning Kit. 6 x Bore Brushes: Used for bore wall cleaning -- 8mm, 10mm, 12mm, 15mm, 17mm, 19mm. 4 x Helix Brushes: Used for deep seat cleaning -- 1.375", 1.1875", 1.160", 0.990".
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