Shelco’s MPX, MPA & MDA Series Absolute Rated Pleated Cartridges are rated at 99.98% Efficiency give you extended life. Absolute Beta 5000 / 99.98% retention ratings from 0.2 to 50 microns. The 100% polypropylene construction makes these compatible with a wide range of chemicals. From 5.6 to 7.0 square feet of media surface area designed for maximum throughput and particle retention at the lowest pressure drop and rigid, molded cage protects pleated media and strengthens structural stability. Manufactured in Class 10,000 clean room for highest purity and meets applicable CFR criteria and USP Class VI Biological Test for plastics.