Features: Equipped with double high precise pressure gauges and a premium electromagnetic , this CO2 regulator ensures precise gas flowing control for aquarium plant while minimizing waste through on/off responsiveness. Regulate the amount of CO2 initially precisely and safely with the CO2 regulator. Bubble counter with thickened tube has improved longer service life. High pressure check , the 2 screens allow you to read the parameters and you can adjust it as the way you want. Quality aluminum, not only does the simple design make installation easy, it also makes your aquarium more beautiful. Specifications: Component: Aluminum Alloy Size: approx.13x12cm/5.11x4.72inch Quantity: 1pc Package Includes: 1x Aquarium Pressure Gauge note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Syringeless fittings