All micro filters supplied with preassembled automatic overnight drain . Porous bronze 40 micron filter element allows less pressure drop and longer cleaning intervals. Safety metal bowl guards or metal bowls available with 1/4", 3/8", and 1/2" models. 3-stage baffle system for exceptional moisture removal. Element range 10 or 40 microns exactly matching filter and air flow needs. Maximum pressure: 150 P.S.I. Temperature range 40 deg. F. to 120 deg. F. Maximum SCFM 48. For compressed air service. Not to be used on life support systems or breathing air systems.