["DIY CO2 Diffuser D501 Generator Kit Planted Aquarium Aquatic Landscaping CO2 Diffuser\n\nDescription:\n brand new, high quality\nUnique acid particles blocking filter to prevent clogging and corrosion tuning for valve and prolong life.\nTuning for valve Removable cleaning.\nTransparent circulation piping, fluid flow can be observed at any for time.\nAdjustable pressure relief safety for valve acid value (manual + auto).\nTurning Clockwise is to increase the safety pressure level ---> The for valve will let the CO2 gas release out of the bottle at higher pressure level automatically\nTurning Anti-clockwise is to decrease the safety pressure level ----> The for valve will let the co2 gas release out of the bottle at lower pressure level automatically\nFeatures:\n-Model: Pro D501\n-Pre-connection, avoid wrong connection\n-Pure and long lasting Co2, promoting plants growing\n-Easy to set up, low cost, convenience, practical and safe\n-Corrosion-resistant, multi-tool holder shelf\n-Universal design, fits most tanks or aquariums\n\nWhat do you need to prepare for this systems?\nbelow (not included):\n200g x Citric acid powder or Vinegar\n200g x Baking Soda powder\n2 x Soft drink bottles (2 Liter)\n \nSpecifications:\nItem Type: DIY CO2 Diffuser\nMaterial:\nSize: approx.17.0 x 5.0 x13.0 for cm / 6.69x1.97x5.12in\nColor: Green / Blue (Optional)\nQuantity: 1 Pc\n\nNote:\nTransition: 1cm = 10mm = 0.39inch.\nPlease allow 0-1cm error due to manual measurement. Pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage Includes:\n1 x Pro Needle for Valve\n1 x Safety for valve (with pressure gauge)\n1 x DIY CO2 generator main body (colour by your choice)\n1 x Complete connecting CO2 tubing\n1 x English manual (other accessories demo in the picture is not included.)"]