Miniature air regulator series ARJ is part of SMC's pressure control equipment line. The ARJ series is available with or without one-touch fittings depending on the model type. All models come standard as direct operated relieving style. Two mounting thread options are available on the ARJ210 & ARJ310 series. ARJ1020F comes standard with M5 threads. Options include bracket, pressure gauge, and manifold base (depending on model).