Features: Specially designed for grass-tanker, low temperature solenoid valve, corrosion resistances, long service life Constant pressure design, professional sealing technology, high adjustment accuracy, high-precision tuning, easy to achieve 1 bubble every 3 seconds Integrated water coil with indicator light. Double screw reinforcement to avoid loosening and air leakage.Universal for various thread. 360degree adjustable direction fine-tuning valve,can be applied to all kinds of cylinders,side,etc. Specifications: Material:Alloy Size:As Pictures show Color:Silver Package Includes: 1xAquarium Co2 Regulator note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to difference between different monitors, the picture may not reflect the actual color of the item.