Sidco Replacement Elements  Coalescing Filter CONSTRUCTION Several designs make up this product line, starting at the two stage fiberglass tube style and extending to pleated coalescing media. Premium grade components and molded ends, made of oil resistant polyurethane, are standard with these products. UNIQUE FEATURES Designed to remove entrained liquid and mist from air/gas pipelines and vents. The efficiency rating and pressure drop varies with each design.