Astro Pneumatic 2615 3/8" Filter/Regulator with Gauge. Prevents costly damage to air tools caused by rust, scale and moisture. Convenient minimum installation time into your compressed air system. Efficiently traps moisture while passing through clean, dry compressed air. Gauge has rugged polycarbonate case with 2" face. 1/4" or 3/8" NPT with Max 135psi.