ARKSEN Pro Deluxe Universal Manometer Fuel Injection Pressure Gauge, Yellow The uniquely designed 3-1/2" gauge has a special expanded 1lb. increment dual dial for accurate reading, with a 140 PSI /10 bar scale It also has a relief valve and 6 ft. of tubing to relieve the pressure and fuel safely. Also allows checking for sufficient fuel flow The included adapters, hoses and fittings cover all fuel injection systems and most cars and trucks world wide! Set comes in a specially designed molded case to make storage easy and organized Gauge has hook, allowing technician to have both hands free