Comprehensive kit of adaptors and fittings for modern Schrader test port fuel injection systems Components fitted with quick coupling system and safety valve to prevent inadvertent discharge of fuel under pressure dual scale gauge reading 0-145psi 0-1000kpa 10 BAR Pressure release valve with drain hose for safe fuel recovery This set is for both petrol and diesel. Its comes with the bigger Schrader valve for diesel but not petrol. To use it on petrol engine you will have to use either the t-piece after the fuel filter of find a cap in the fuel line that one of the adaptors will fit Large dual reading gauge in both psi and kPa Pressure release valve and drain hose Schrader valve for diesel (bigger one) Adapters, fittings and hoses for modern Schrader test port fuel injection systems For petrol and low pressure diesel pumps 14 Various Plated Fittings,With Quick Coupling Systems and Safety Valves 300psi Rubber Threaded Extention Tube 2 Rubber Tubes 1 off, that is High Pressure + 2 x Clips