Features12 Holes 2 Way: Turbine unit set adopted 2 holes and 2 ways, foot pedal control, which as same as standard chair operation method. 2Full Functional: With turbine machine, water pipe, and water bottle, with all the functions of a desk chair and meets everything for regular use. 3Gas Pressure: 2 Way turbine unit adopted 4?8kg gas pressure input, 0?4kg gas pressure output, and with0.01 mpa?0.4 mpa gas pressure range. 4Portable Size: 2 Holes turbine machine set is small in size and light in weight, easy to be carried in your bag for using any time or any where. 5Stainless Steel: Turbine unit set is made of stainless steel material, firm and sturdy, rustproof and durable, which is not easy to broken.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