100% brand new and high quality Do you want to make CO2 yourself for your fish tank? This kit will be a good choice. It is easy, safe to operate and can create CO2 constantly by the reaction of citric acid and soda. With it, you can make CO2 at home conveniently. Features: Fully installed, direct to use and labor-saving. Well-sealed Cover& pipes, leak-proof, non-deformed, never loose. Professional pressure guage for safe-area indication, pressure watching. Decompression automatically for safer usage and operation. Cheap, simple to create pure CO2 constantly by chemical reactions. With adjustable air flow vavle to control CO2 volume easily. Tips to install: The bottle must be carbonated beverage bottle, do not use pulpy, green tea, mineral water bottles, etc. trimming valve regulation avoid by sudden big or small, can't suddenly turn up, after immediately shut down again, so as not to cause abnormal pressure to the bottle. Note: Make sure carefully observe the direction of the parts before assembly. The usual wrong handle way will cause abnormal reaction components as follow: the contrary direction of the check valve and fine-tuning in the direct. Specification: Material: ABS Plastic,Stainless Steel Connecting Pipe Length: 2M/78.74'' Pressure Guage Dia.: app.4cm/1.57'' Cap dia.: app.3.5cm/1.38'' Color: As the pictures shown Quantity: 1 Pc Note: 1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x CO2 Generator Kit (Without retail package)