Strainers manufactured from Schedule 10, 316 stainless steel pipe with Van Stone type flange 316SS stub ends and 304SS back up rings. Strainer lids are made from 1" acrylic, secured with 304 stainless eyebolts. Lid is sealed securely using a ¼" neoprene gasket. Ships complete with 316SS basket with 1/8" perforations on 3/16" centers (40% open area).