Miniature 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 and ARJ310 series. ARJ1020F comes standard with M5 threads. Options include bracket, pressure gauge, and manifold base (depending on model).