Hangzhou Shunshi Hardware & Machinery Co., Ltd is a professional manufacturer of HVAC system equipments. Our products mainly include roof hatch,access panel,air conditioner bracket,supply air registers, return air grilles, return filter grilles, air diffusers, aluminum air registers and many other special air vents. We also produce various pressed hardware and accessories, such as weather vane, metal case,clamp,clip,holder, expansion tube and so on. With our best quality and competitive ...