Shelco’s High Flow Cartridges are designed for industrial. and commercial filtration at an economic price and an. exceptional value. All Polypropylene construction. 98% retention ratings from .5 to 70 microns. Heavy-duty outer cage replaces costly stainless steel support basket. Handle provides fast and easy push / pull installation. O-ring seal on cartridge eliminates bypass. Inside out flow retains contaminant during change out. Multi-layer pleated media designed for high flow and long service life. Thermally bonded construction. FDA listed materials – All materials comply with FDA Title 21 of the Code of Federal Regulations Sections 174.5 and 177.1520.