Specially designed with high dirt holding capacity. These elements are used for dry gas filter applications. Sizes available: 3.5”, 4.5” 5.5” OD, Lengths up to 50”. Flow direction out to in. Nominal Micron size available 10 , 5 , 1 , 0.5 , 0.3. Materials of construction: Polypropylene, Polyester, Fiberglass, Cellulose.