【Dual pressure gauge design】: Our cylinder valve has two pressure gauges, one gauge indicate the tank pressure,the other indicate the filling pressure. It is convenient for you to monitor the air pressure is under 4500psi in real time. 【Types of Threads】:M18*1.5 Be sure to check the tank thread before purchase, or contact me if you do not know your tank thread. We also have other type of thread on sale. 【Safer work design】:When refilling air to paintball/pcp tank ,there is one burst disc rated for 6000psi that can protect the tank over filled 4500psi working pressure;When finish filling air to painatball/pcp,there is a release valve to protect the installation and release safer and easier. 【High-pressure hose contained】: We also provide you a 50cm high-pressure hose with 8mm femal quick-release coupling plug,and it could be connected and released from other male fittings within seconds. 【Applications widely】:Mainly used for high-pressure air tank refill,PCP air gun charge, paintball fill station,high pressure tank switch,air flow control etc. in paintball games,or scuba diving, outdoor adventures or industrial applications.