Highly effcient and portable.Used to ventilate hot air and harmful gases from a tank or work area,and supply fresh air and oxygen.The ideal bell-mouth type casing is highly efficient,creates little noise and is easy to install in an air duct SIZE 200MM 300MM 400MM 200MM 300MM 400MM Blade diameter 200mm 300mm 400mm 200mm 300mm 400mm Voltage 110V 110V 110V 220V 220V 220V Frequency 50/60HZ 50/60HZ 50/60HZ 50/60HZ 50/60HZ 50/60HZ Power 180/230W 500/550W 1200W 180/230W 500/550W 1200W Rotational speed 2800/3300 2800/3300 2800/3300 2800/3300 2800/3300 2800/3300 Air volume m&sup3;/min 25/30 65/75 120/130 25/30 65/75 120/130 Packing & Delivery To better ensure the safety of your goods, professional, environmentally friendly, convenient and efficient packaging services will be provided. Company Proflie >> "EXCELLENT QUALITY" , "BEST PRICE", "SOONEST TIME"<< >> One of the biggest marine hardware wholesaler in china. >> 15 years of professional reliable service. >>10000 square meters store warehouse guarantee the shortest delivery time >> Member Of IMPA International Marine Purchasing Association. Exhibition 2013 SEA ASIA 2014 SMM HAMBURG 2019 ROTTERDAM MARITIME FAQ Q: What qualifications does your company have ? A:IMPA Member and IMPA Standardized Products World Top 10 Ship Chandlers's Expertised Supplier for 15 Years. Authorization of "AAA Grade Credit Enterprise" from Government Q: Can I get qualified products? I do not want any shortage , damaged products A: Professional Q.C. (quality control) Team & Testing Equipment Correspondent and Effective CCS, MED, CE Certificates Exclusive and Famous Brand" KENPO,SEMPO,HOBOND,FASEAL ,GLM" Q: How long is the delivery time? A:1~15days Quick Delivery Time . Abundant Stock Items at Hand Big Stock Capacity Guarantee (10000-Warehouse) Various Logistics Option(DHL, TNT, Rail/Air/Sea Freight)