ITEM NAME:Aquatic Plant Tank CO2 Gauge Fine Tuning Regulator Bubble Counter Twin Head Description: Stainless steel inner part with aluminum alloy to release CO2 by fine tuning. Co2 regulator valve applies nut lock design can effectively lock the CO2 tube, to prevent the accidents caused by loose. Light weight, easy to operate.Easy to install without using any tool. The adjusting precision is high, and the air leak will not occur under the high-pressure system. Fit for standard aquarium 4mm/6mm hose. Specification: Material: Alloy Size(WxH):approx.4.4x3cm/1.73x1.18 inch Package Includes: 1 Piece CO2 Adjustment Valve Note: Since the size above is measured by hand, the size of the actual item could be slightly different from the size above. Due to the lighting effects, monitor settings, etc. There could be some slight difference in the color tone of the pictures and the actual item. SKU: FUZ0026026364020646.Co2 regulator valve applies nut lock design can effectively lock the CO2 tube, to prevent the accidents caused by loose. Stainless steel inner part with aluminum alloy to release CO2 by fine tuning.