Saim Waterproof Plastic Electronic Project DIY Junction Box Enclosure Case 158mm x 90mm x 46mm Surface Mounted, waterproof sealed plastic electrical enclosure case Junction box. External Size: 158 x 90 x 46mm/6.2" x 3.5" x 1.8"(L*W*H); Internal Size: 148 x 80 x 40mm/ 5.8" x 3.1" x 1.6"(L*W*H) Fixing Hole Diameter: 7mm/0.28" Waterproof rate: Ip66. Great for electronic projects, power supply units, student projects, amplifiers, etc.