Set of schrader type fuel port test adaptors which can be used with the fuel pressure gauge supplied in the Diesel Fuel System Bleeding Kit - Master Kit - 31467000 Can be used to bleed air from the Schrader valve test port on specific vehicles - e.g. Saab Schrader test ports are the preferred method of measuring fuel pressure on vehicles with fuel rails Quicker and easier than breaking into fuel lines Applications include: Alfa Romeo, BMW, Fiat, Ford, Jaguar, Land Rover, Mercedes, Mini, Saab, Vauxhall and Volvo