GW OTS 6 Elements Teflon Immersion Heater features 6 incoloy® sheathed, Teflon® sleeved, U-shaped elements to provide single or three phase heating in a compact space. This heaters are designed for installing in the top of a tank with the heated portion directly immersed on the side. All GW’s teflon heaters are supplied with “One-Time” thermal fuse preventer as over-heating. Special design liquid tight terminal cover prevents entry of liquids. A polypropylene protection guards are recommended.