Attention   1. This product comes without a manual, If you don't know how to use it, please contact us. 2. The color of the box is red or blue. If you mind, please contact us first. 3. We don't ship to the following area from our European warehouse *Spain: Canary Island,Balearic Island *France: French Polynesia, Reunion Island *Portugal: Madeira Azores     Descriptions:       Pressure loss can be located easily by hand or leakage spray.   Pressure gauge with shut off valve regulator to help prevent over pressurisation.   Please check the Sizes of 4 Pairs of Stepped Adapters:   35, 40, 45 mm (1.38'', 1.57'', 1.77'') 50, 55, 60 mm (1.97'', 2.17'', 2.36'') 65, 70, 75 mm (2.56'', 2.76'', 2.95'') 80, 85, 90 mm (3.15'', 3.35'', 3.54'').   Operation:   Select the correct adapter by first measuring the hose diameter.   Select correct size adapters and place in hoses,then tighten the clamp     's maximum pressure and retest.   Release the pressure in the system by rotating the ball valve lever to align with hose axis. Disconnect the quick coupler, clean and return all items to carry case.   PackageIncludes:     8PCS Plastic Stepped Adapters(35mm - 90mm) 1PCS StorageCase