Aquarium CO2 Regulator for Paintball Tank with 12V Newest Mini Solenoid - DESIGN FOR PAINTBALL TANK. Connect to paintball CO2 tank, no adapter required, no assembly required. - 12V DC SOLENOID WITH PRECISION NEEDLE VALVE! This co2 regulator use 12V DC solenoid valve repalced AC solenoid valve, safer and more stable, lower power, no noise. Aquarium specific needle valve, High precision fine-tuning easy for co2 to be 1 bubble in 3 seconds. - BUBBLE COUNTER WITH CHECK VALVE FUNCTION! Come with bubble counter, you can read your co2 flow rate directly via the bubble counter. Bubble counter with check valve function, stop water backflow to bottle. - CLASS 1 MANUFACTURING TECHNOLOGY! The co2 regulator is made of hard aluminum alloy, surface spraying treated. - ATTENTION: Only suite for paintball tank(Paintball tank is NOT included, for demonstration purposes only.Please fill up your paintball CO2 tank if you purchased the tank online before using the regulator. The paintball CO2 tank is shipped empty due to safety concern). Fzone will offer a round-the-clock service, and you can reach out to us at any time for any product-related concerns.