Pressure Range: 0-150 Psi. Material: High-strength aluminium. Size: Two holes of 1/4" NPT and one Gauge Port 1/8" NPT. Design Concept: Integrated valve design integrating measurement and adjustment, detachable. 【Easy to Read】This regulator comes with a 0~150Psi dial gauge, Makes adjusting your pressure values a piece of cake. 【Port Size】The air regulator has 3 holes,Two holes of 1/4" NPT and one Gauge Port 1/8" NPT. 【Adjustment Knob】The air pressure regulator has a plastic adjustment knob that allows for smooth "light touch" flow settings, knob with a lock function, and cannot be turned when the knob is pressed. 【Accurate Measurement】The air compressor pressure regulator Provides accurate gas flow regulation and Accurately measures gases. 【Package included】1 x AR2000(Air Pressure Regulator), 1x Dial gauge for the 1/8" NPT,1 x Valve Shut Off Switch, 2 × 1/4" × 1/4" NPT Male Pipe, 1 × Nickel-plated Iron Air Plug, 1 × Nickel-plated Iron Air Coupler, 2 × PC-1/4-N2, 1 × Teflon tape.