The turbo system leakage tester helps locate air leaks in the components by plugging the output side of the turbo and plugging the intake inlet Air is applied through one end of the adapter to show the presence of leaks within the system Kit features a pressure gauge, shut off valve and pressure regulator Comes with 6 pairs of stepped adapters to fit most size hoses This setup can also be used on cooling system hoses WARNING: Injury could occur if system is over pressurized - We Recommend NOT exceed 15 PSI Components Includes adapters, sizes: 7912X01 - 16mm / 22mm - Inlet Adapter w/ Coupling 7912X02 - 16mm / 22mm - Block Adapter 7912X03 - 25mm / 32mm - Inlet Adapter w/ Coupling 7912X04 - 25mm / 32mm - Block Adapter 7912X05 - 35mm / 45mm - Inlet Adapter w/ Coupling 7912X06 - 35mm / 45mm - Block Adapter 7912X07 - 50mm / 60mm - Inlet Adapter w/ Coupling 7912X08 - 50mm / 60mm - Block Adapter 7912X09 - 65mm / 75mm - Inlet Adapter w/ Coupling 7912X10 - 65mm / 75mm - Block Adapter 7912X11 - 80mm / 90mm - Inlet Adapter w/ Coupling 7912X12 - 80mm / 90mm - Block Adapter 7912X13 - Pressure Gauge Assembly