we are qingdao shuangjunli machinery co., ltd, we has all kinds of poultry fans which can satisfy the need of different poultry and pig house as well as greenhouse and workshop. the fan has accredited europe of ce certification frame: galvanized steel sheet, the layer of the galvanization is 180g/ ㎡，and the frame is one-off molded, also there is a outlet in the bottom. fan blades: 6 pieces of mirror finished stainless steel blades with the diameter of 1270mm and the angle of the blades is patented designed. the fan translations have all passed the experiment of homeostasis, which makes the air volume keep the same as the very beginning during the operational life span of the fans. shutter: high strength hot-galvanized steel sheet, with a centrifugal system which can ensure the shutter opens with the angle of 90 degree under all the condition. and uncontrollable air can never goes into the birdhouse as the shutter works. belt pulley: the v type belt pulley is aluminium magnesium alloy injection moulded, so it’s light and high-strength. belt: mistuboshi belt. siemens motor: the motor is high efficiency and low wastage of energy and have accredited 3c and ce certification; the grade of protection is ip55 and the insulation grade is f. maintenance free: there is no use to maintain it during its life circle. modelblade diameter/ mm　frequency/ hzcurrence/ ainput power/ kw　votage/ vrotational speed　noiceair flowsize/ mm dm1000910(36in)501.250.43801440≦64208001000*1000*450 dm13801270(50in)502.81.13801440≦65430701380*1380*450 we can assure that the quality is the best and the price is competitived, if you are interested in our goods, please contact me .thank you very much! best regards, olive msn: olive0807@live.cn skype: olive0807 e-mail: olive08077@gmail.com web: www.sjlmachine.com