Carbon steel, or SS304 or SS316 stainless steel iron construction for best chemical compatibility and corrosion resistanceLow pressure dropsPermanently piped housingsCovers are O-ring sealedAll housings are electropolished to resist adhesion of dirt and scaleEasy to clean!Adjustable-height legs, optionalFour pressure ratings: 200 psi (with clamp cover) and 150, 300, or 500 psi (with eyenut cover)Duplex units are availablePipe sizes 3/4 thru 2-inch, NPT or flanged (standard 150 class flange)Two basket depths: 6, or 12 inches (nominal)