FilmTec™ TW30 PRO-4040 Elements are the industry standard for reliable operation and production of the highest quality water in commercial applications. This element features the thickest feed spacer (34 mil) available in the industry today to lessen the impact of fouling.  FilmTec™ TW30 PRO-4040 elements are tape-wrapped—built with the same high-quality membranes and materials of construction as industrial elements, except for the hard outershell, and are more economical for commercial systems with one or two elements per housing.