- Used to clean/decarbonise injector seats when changing injectors - Set of four diesel injector seat cleaners, centring pilot and T-handle - Centring pilot: 7mm - Various Vehicles: 15mm - Delphi/Bosch: 17mm (BMW, PSA, Ford) - Bosch (Mercedes CRD):17mm - Angled (Fiat, Iveco): 17mm