Features1Package Included: With turbine machine, water pipe, and water bottle, which is same as standard chair operation method, foot pedal control. 2 Holes 2 Way: Turbine unit set adopted 2 holes and 2 ways design, with all the functions of a desk chair and meets everything for regular use. 3Portable Size: 2 Holes turbine machine is small in size and light in weight, can be easily put in your bag, which can be used at any where. 4Gas Pressure: 2 Way turbine unit adopted 4?8kg gas pressure input, and 0?4kg gas pressure output, which can provide stable performance. 5Stainless Steel: Turbine unit set is made of stainless steel material, firm and sturdy, rustproof and durable, which can be used for a long time.SpecificationItem Type: Turbine MachineMaterial: Stainless Steel Control System: Gas control system (working with gas compressor)Gas Pressure Range: 0.01 mpa-0.4 mpaGas Pressure Input: 4-8kgGas Pressure Output: 0-4kgWater Pressure: 0.1mpa-0.25mpaPackage List1 x Turbine Unit 1 x Water Pipe 1 x Water Bottle