Festo MS6N Air Prep Combo Filter/Separator/Shut-Off Valves Pressure Switch 3/4"In Good Used Condition, Removed from a Working Environment. MS Series Air Prep Combo Unit with Pressure Switch MS6 SDE5 AD7. These have right and left hand thread side plates 3 4" with hose fittings. Unit includes: Filter Regulator: MS6N LFR 1 2 D6 E R M AS Separator: MS6N LWS 1 2 U V (2) Shut off valves: MS6N EM1 1 2 S (2) Distributer blocks: MS6N FRM 1 2 I (One of these has pressure switch MS6 SDE5 AD7) 19 1 2" Overall length.