Our enterprise since its inception, usually regards product top quality as business life, repeatedly enhance manufacturing technology, make improvements to product excellent and continuously strengthen enterprise total high quality administration, in strict accordance with all the national standard ISO 9001:2000 for Forced Air Inlet, Panel Free Stall , Tunnel Inlets For Poultry House Ventilation , Evaporative Cooling Pad For Poultry ,Livestock Ventilation Systems . All prices depend upon the quantity of your order; the more you order, the more economical the price is. We also offer good OEM service to many famous brands. The product will supply to all over the world, such as Europe, America, Australia,Swaziland , Namibia ,Panama , Czech Republic .Our items are widely recognized and trusted by users and can meet continuously developing economic and social needs. We welcome new and old customers from all walks of life to contact us for future business relationships and achieving mutual success!