The filter elements are designed for use in the aerospace industry and is made of pleated 304 stainless steel with a filtering capacity of 10 micron on a total of 4 square inches of effective filtration area. It will flow 6 gallons per minute with the least possible restriction. Washable and indefinite re-useable. Filter housing is aluminum with a durable anodized finish. Dimensions 1.375"ø x .875" (34.9mm x 22.2mm). Fittings not included.