Body: nylon PA66;Contact: brass;CE,ROHS,UL certificated IP68 Waterproof Cable Connector Junction Box: Rubber ring and clamping nut were built in the junction box, which provide the perfect waterproof and excellent sealing; IP68 Waterproof connectors can be used in water but not more than 2 meters Strudy Materials: The casing is made of nylon PA66 with high-temperature resistance( -20° C - 110° C); The screws are made of long-lasting brass;The inner conductor is copper core filling for better abrasion resistance and electronic conductivity; It will not crack or fade in sunlight, corrosion-resistant, long life: The outdoor junction box can be also installed underground or outdoor temperature extremes. Suitable Cable Size: Apply to cable size: Ø5-9mm(thick grommet built in the body), Ø9-12mm(thin grommet included in the package for options use); apply to wire diameter:Ø0.5-2.5 mm²AWG24-13); the nut size of this 3 way junction box is M20; the outdoor electrical box inclu