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EPTFE is a brand new water-resistant and breathable materials The waterproof and breathable membrane has 3 functions: 1 waterproof: micro pores of zero μ m, with pore diameter lower than ten thousand times that of water droplets, making it impossible for water to pass through, effectively retaining touchy parts, warding off liquid erosion, and recuperating product service existence 2 air permeability: the pore diameter of the micropore is 700 occasions greater than that of the water vapor It is water resistant and allows the air to go smoothly It can effectively use up heat, prevent the interior wall of the product from fogging, and balance the air stress within and outside the space 3 dust prevention: the microporous channels sort a community three-d structure in the membrane, with uniform and dense microporous distribution, so that the dirt is blocked to attain superb dust prevention effect, and zero micron debris can be captured Main functions: 1: Effectively block water, salt and different corrosive liquids, and make sensitive elements of the package safely leak exterior 2: Air permeability could be soon restored after contact with water, oil and different liquids 3: The dense and uniform micropore distribution can effectively block dust whereas being waterproof and breathable 4: Balance the pressure, prevent the air and water around the sealing elements from coming into the machine body, and protect the sealing integrity 5: Protect the parts from the weather and withstand the immersion of water and different liquids 6: Make the safe parts easy to clean, loose from corrosive pollutants, and make sure the performance and repair life of the components 7: UV resistant, with strong chemical inertia 8: Thin and light, with nice concealment, it brings convenience to design and manufacturing Package includes:48pcs/sheet