Hunan Keensen Technology Co.,ltd professional at the water treatment area which maufacture and techical service of RO and Nf membrane elements. owning the core technology and capability for fabrication of membrane sheet .the membrane sheet is also produce at our factory ,the technology of membrane sheet is import from USA . Now our brand "keensen " is the second brand at china which cooperation with many big brand ,such as :Midea , Gree ,ect ,with best feedback .