alpha clean air technology ltd is the manufacturer of various clean room,hepa filter for indoor air cleaner .the filter large used in pharmaceutical,food,electrics,hospital,auto plant. we provide super fast transportation,door to door service all no problems ,we deliver goods though dhl,ups,fedex or by sea way in very resonable price . " trade in honesty,business in professional" as our priorities. our product as follows: air shower,material pass box, clean bench,laminar flow stands, fan filter unit . hepa filter,v bank filter. pre filter,pocket filter ceiling filter,inlet filter ,fiberglass roll,300c high temperature resistance filter Air Grilles&Diffusers dampers. all product relative to heating ventilation air conditioning we glad to help to source with high quality goods to you . We hope to establish cooperative relationships . We are looking forward to your kind inquiries.