All Detech coils are made using high quality materials. The housings are made of UV protected material. Their inner side is covered with chopped-strand material for a better shock resistance. Detech uses resins, which are “transparent” for the electromagnetic waves, and perfect shielding. The coils are water resistant, and operate in a wide temperature range. The search coils are standardly equipped with excellently fitting cover, and have a two years full warranty.