Recognized as one of the industry's most cost effective media available in the marketplace, Schroeder E media is an excellent choice for a wide variety of hydraulic system applications. Schroeder E media, composed of cellulose (paper), is a standard for numerous industries, which enables continuous trouble free system operation. Schroeder K3 E-Media Filter Cartridge: Cellulose, 9" Cartridge Height, 3.9" Cartridge OD, 1.625" Cartridge ID; 3 Micron (nominal); 150 psid maximum differential presure; Removes: Rust, Metallic Debris, Fibers, Dirt; Dirt Holding Capacity: 54 grams.