[. . . ] The S3L is designed for dry material collection while the S3LW is equipped for picking up liquids and other wet hazardous materials. [. . . ] The units are made of 304 stainless steel and feature optional HEPA or ULPA filtration. · Powered by compressed air for use where electricity is undesirable or unavailable. · All stainless steel construction including container, filter chamber and trolley. · Equipped standard with 50-foot air supply hose, ground cable and clamp. S3L 157 99 6. 6 8. 8 20 x 24 x 40 53 72 30 7. 5 50/2. 0 1/2 50 99. 97% @ 0. 3 microns S3L W 157 99 13. 2 8. 8 20 x 24 x 40 61 72 30 7. 5 50/2. 0 1/2 50 99. 97% @ 0. 3 microns mm/inches inches feet % % 99. 999% @ 0. 12 microns 99. 999% @ 0. 12 microns *Collection of commercial alloys is subject to individual approval by our application engineer. ** Specifications may change without notice. Remove combustible dust and debris from hazardous locations A 1 5 E XP W Easy to remove wheeled collection container on A15EXP Optional upstream HEPA filter on A15EXP, dry unit External filter shaker on S3L for dry material collection Both models include antistatic, conductive accessories for ultimate safety Want to learn more about combustible dust and best housekeeping practices?Scan the barcode with your smart phone to visit our combustible dust focus site! We've earned our solid reputation by consistently producing top-quality vacuums and offering the industry's most complete selection of vacuum filtration options, attachments, and accessories. We back all of our products with our industry-leading two-year warranty. [. . . ] We back all of our products with our industry-leading two-year warranty. [. . . ]