The waterproof Junction box is made of Fireproof Plastic, IP66 waterproof rated. Solid construction and a good seal to protect against sun exposure, dust, corrosion and rainstorm. Very suitable for outdoor use in harsh environments. Outer Box Size:7.13'*4.37'*3.94' (181*111*100mm) Inner Box Size(Approx):6.73'*3.94'*3.54'(172*100*90mm) ; Color: Grey. Mounted Type: Surface Mounted. We have 3 sizes and 2 colors for you to pick from. The DIY opening hole design greatly ensures the sealing of the waterproof project box. Up to 10 holes can be distributed on the 4 sides of the waterproof box. The waterproof electronic box has cover with 4 screws to fix it. There is a rubber sealing strip in the groove of the cover, which can make the cover and waterproof box more sealed to ensure safe use in bad weather. Can be configured with M20*1.5 mm Cable Glands.