EPTFE membrane manufacturer / supplier in China, offering Spider PE Hydrophobic IP 68 Breathable D17 Chemical Vent Industrial Aluminium Packing for Bottles Pilfer-Proof Feature, Spider M12*1.5 LED Lighting Hydrophobic IP 68 Waterproof Air Vents Air Permeable Plastic Valves, Spider Aluminium-Plastic Waterproof Breathable Foam Vent Wads with Holes Bottle Stopper for Chemical Use and so on.