100% brand new and high quality Features: Fully installed, direct to use and labor-saving. Well-sealed pipes, leak-proof, non-deformed, never loose. Specialized pressure guage for safe-area indication, pressure watching. Automatic or manual decompression for safer usage and operation. Metal air flow adjustment vavle is preciser than normal plastic product. Cheap, simple to create pure CO2 constantly by chemical reactions. Advantages: Green transmission channel is made of PC material, solid, corrosion-resistant. Air flow adjuster is dismountable to clean, cooperate with filter, can avoid damage caused by false operation. Special transmission channel design can avoid aging(soft pipes are easy to age), and does well in leak-proof. Besides, you can clearly see the flow of liquid, watching chemical reactions at any time. Not easy to accumulate liquid in the channel, make the most use of raw material. Note: Don't open bottle directly when there's still on pressure, please wait for its automatic pressure release. Please use food-grade citric acid and baking soda as the raw material. For more specific instructions and usage, please read our English user manual. The initial set of safety vavle is 4kg/square meter, you can also adjust it manually. Specification: Green Transmission Channel: PC (Material) Pipe:PU Plastic Air Flow Adjustment Vavle: Integral Metal Size:as picture shown(approx) Connecting Pipe Lenght:160cm/6.24''(approx) Green Transmission Channel Size:15.5cm x 3.6cm x6.2cm/6.05'' x 1.4'' x 2.38''(approx) Pressure Guage Size:3.5cm x 2cm/1.37'' x 0.78''(approx) Air Flow Adjuster Size:3.2cm x 3cm/1.25'' x 1.17''(approx) Color:Green+White Quantity: 1 pc Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual colorof the item. Thank you!