The SMC series AR-B regulators cost effective and clean looking offer various pressure range settings to accommodate most applications. The locking adjustment knob prevents accidental setting changes. The modular design of the AR series connects with other SMC air preparation equipment. Modular type regulator Available with built-in backflow mechanism Optional embedded pressure gauge Rc, NPT or G(PF) threads Diaphragm is made of ozone resistant rubber material (HNBR)