The 90D dust collector and polishing unit is designed to provide heavy duty suction capacity for the laboratory or industrial manufacturer polishing 4-8 hours per day. Its dual-vac suction system is powered by a 1/2 HP, 1725 rpm, ball bearing, capacitor start suction motor. The 90D develops 1000 CFM (cubic feet/minute) [472m3/min.] at a low static pressure for quiet operation. All 90 Series polishing units contain three 12” x 32” x 2” filters [30cm x 81cm x 5cm] (2304 cubic inches) [37.8m3] to effectively entrap 3-5 micron dust particles from wet pumicing or dry tripoli/rouge polishing and metal grinding. The 90 series units are not designed to collect dust from dry plaster and stone trimming operations. The 90D is shipped without a polishing motor. Finished in a durable, baked coating. Suction Capacity - 1000 CFM (cubic feet/minute) [472m3/min.] through two removable 11” wide x 18” deep x 16” high [28cm x 46cm x 41cm] Ever-brite aluminum, lighted hoods with shields. Filter Area - Three 12” x 32” x 2” [30cm x 81cm x 5cm] fiberglass filters. Cleaning - Removable fiberglass filter. Accessories - Unit shipped complete with two splash hoods, shelf, ready for use with polishing motor. Shipping Wgt.: 275 lbs [124.7 Kg] Unit Dimensions: 24” deep x 48” wide x 59” high with 38” height to bench top[61cm x 122cm x 150cm]