Features: Precise control: Pressure regulator pressure valves you can regulate the exact volume. How to use: use the hose as a connector to connect the cylinder and the dispenser, release the pressure slowly, you can see the data according to the pressure gauge. Safety of use: Pressure valves has been rigorously test to meet the high standards of release pressure, airtight and safe. Simply screw the adapter on any brand cream dispenser on the market. Practical materials: the pressure valves is made of quality materials, long-term wear resistant, rust-proof and corrosion resistant, reliable. More efficient: the 580g have a content and is a comfortable pressure valves. Equipped with a pressure regulator, it is perfect for commercial use, such as large scale party preparation and catering event. Specifications: Material: Aluminum Size: Approx. 14x6.5x6cm/5.51x2.56x2.36in Package Includes: 1x Pressure Regulator Valves note: You must wear gloves and goggle, otherwise you will get frostbites. Pressure adjustment can only be adjusted from 0 to high, not from high to low. If you want to re-adjust the pressure, and the adjusted pressure is lower than original set pressure, you need to re-adjust the pressure after exhaust. Tighten by hand to prevent leaks. Turn the front knob to increase or decrease the pressure accordingly. The left table shows the output pressure. The pressure gauge on the right is the cylinder pressure. For most N2O, 40-70psi is recommended