Particulate Filter / Water Trap Coalescing Filter and desiccant dryer combo to clean and dry compressed air lines. In-Line THREE Stage unit includes (1) Particulate Filter / Water Trap - (1) Coalescing Filter - (1) Desiccant Dryer This HEAVY DUTY 3 stage air cleaner system will extend the life of your air tools and prevent costly repairs down the road. Stage 1 particulate filter / water trap with a 5 micron element will remove the majority of the moisture and larger debris and collect at the bottom of the 9oz metal bowl. Stage 2 Coalescing filter has a 0.01 micron filter element and will remove 99.98% of the remaining Moisture Vapor, Oil residue and smaller particulate that may have passed through the Stage 1 filter. Stage 3 Desiccant dryer will dry out the incoming air flow, so you will get perfectly clean dry air down stream to your pneumatic tools and equipment. These systems are highly recommended for paint gun applications and plasma cutters. HEAVY DUTY CONSTRUCTION WITH 11oz METAL BOWLS