Facet's standard carbon steel MS Series SuperFlex filter housings are small, economical housings for in-line removal of solids from aviation fuels when equipped with Facet's M Series filter cartridges, stacked 1, 2 or 3 high. Stainless steel construction is available. Contact your Facet representative for details.Cartridges are selected separately to fit specific application requirements and will be included in the final housing model number.