Key Specifications Table This Filpro Filters Micro Filtration Deltech 817E RD817E FP 10-866 Coalescing Filter is in unused condition and is guaranteed to be fully functional. These filterscame from a local manufacturer that had surplus new old stock inventory. We urge customers to view all photos as they show overall condition, included accessories and useful information. Please feel free to contact us with any questions. PLEASE NOTE: All of the filters associated with this listing are 817E Filter replacements from 3 separate manufacturers. Please see all photos. Filter Media: Glass fiber End Caps: Stainless steel and nylon Support Core: Perforated carbon steel DOP efficiency: exceeds 99.9999%, and this filter element has a tested efficiency of 99.9% at a particle size of 0.01 micron. Lowest Pressure Drop: Initial pressure drop is only 0.4 psi. Pressure drop averaged over the extended element life is only 3.5 psi. Longest Element Life: Pre-separation of particulates extends service life to approximately twice that of other elements. About the Filter Elements Design Superior design and construction combine to provide multistage filtration which effectively removes dirt, fine oil mists, liquid oil and water without a prefilter. Impingement and centrifugal separation remove up to 99% of particles, oil droplets and slugs of water before the air reaches the filter element. This reduces pressure drop and extends element life. The pre-cleaned air then passes through a multi-layered element; each layer removes progressively smaller particles, mists and droplets. Superior Performance Lowers Filtration Cost Tests show that under the same service conditions, 810 Series elements last up to twice as long as other elements and have only half the average pressure drop. Fewer element changes mean less downtime and higher productivity; lower pressure drop means less electric power consumed by the compressor to maintain system pressure."