Feature:<br /><br />\u25cfPromoting plants growing, easy to set up, low cost, safe.<br />\u25cfWith 2 air-pipe locks on the bottle cap, prevent the air-pipe get loose.<br />\u25cfSpecialized pressure gauge, safe area and scale can be seen clearly.<br />\u25cfThe complete DIY CO2 kit combo for planted aquarium. You can built up your CO2 system within 15 mins.<br />\u25cfThis bottle cap is very well suitable to be DIY CO2 system's accessory that the size fits common PET plastic bottle.<br /><br />\u25cfLatticed shape underside makes the pressure even <br />\u25cfNeedle valve can be disassembled to be cleaned<br />\u25cfCorrosion resistant, anti-choking, long life span<br />\u25cfSafety valve can be manual operated<br />\u25cfThick soft tube, deformation resistant<br />\u25cfAlready pass air-tight test, safe<br />\u25cfCan be used as rack<br /><br />Attention:<br /><br />\u25cfThe bottle have to use carbonated beverage bottle, do not use pulpy, green tea, mineral water bottles, etc.<br />\u25cfTrimming valve regulation avoid by sudden big or small, do not suddenly turn up, after immediately shut down again, so as not    to cause abnormal pressure to the bottle.<br /><br /> \u25cfMake sure carefully observe the direction of the parts before assembly. The usual wrong handle way will cause abnormal react ion components as follow: the contrary direction of the check valve and fine-tuning in the direct.<br />  <br />Product Attributes: <br /><br />Model:D501<br />Material:Durable PC<br />Color:Blue or Green (Send by randomly)<br />Size:approx.16*6*3.5cm\/6.3*2.36*1.38inch(L*W*H)<br /><br />  <br /><br /> <br />  <br />   <br />   <br />   <br />   <br />   <br />  <br />  <br />   <br />    <br />     Model<br />    <br />     Thumbnail<br />    <br />     Vavle<br />    <br />     Pressure Gage<br />    <br />     Cover<br />    <br />     Tube<br />   <br />   <br />    <br />     D201<br />    <br />     <br />    <br />     <br />    <br />     <br />    <br />     <br />    <br />     <br />   <br />   <br />    <br />     D301<br />    <br />     <br />    <br />     <br />    <br />     <br />    <br />     <br />    <br />     <br />   <br />   <br />    <br />     D501<br />    <br />     <br />    <br />     <br />    <br />     <br />    <br />     <br />    <br />     <br />      <br />   <br />  <br /> <br /><br /><br />Package Include:<br /><br />1x DIY Co2 generator system D-501<br />1x Needle valve<br />1x Pressure gauge with build-in safety valve<br />2x Air-pipe(Section A and Section B)<br />1x Extra air-pipe<br /><br />If you want to set up the Generator ,you need (not included in the product):<br /><br />1x 200g of citric acid<br />1x 200g baking soda powder<br />2 x Soft drink bottle (recomended 2L bottle)<br /><br />Note:<br /><br />1.Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand. Make sure you don't mind before you bid.<br />2.Please allow 1-5mm differences due to manual measurement.<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /> <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />How to set it up:<br /><br /><br /><br />Green                                                                  Blue