... conatcting surface, also applying copper-aluminum adapter connection. Insualtion case extremely seals and covers on insulation wire, it takes effect ... on water-proof.Structure feature1, Whole insulation case, it has the self-sealing stucture, whose character is ... the clamp has long service life. Waterproof seal adopts high quality rubber band and silicagel. Inslot blade is coated by ...