GE-313 Teflon Plastic Paddle Flow Switches , This products is produced by teflon plastic material with a long paddle, suitable for big pipe, used in SPA Appliance, Sea Water Heating System, Water Purification Equipment, Welding Equipment, Chlorine Liquid, Laser System, to measure or control the liquid flow rate. International Protection could be IP68 (Optional). CE certificate for the flow switch, UL certificate for micro switch.