BestTong ABS Plastic Waterproof Electronic Project DIY Junction Box Enclosure Case 230mm x 150mm x 85mm Surface Mounted, ABS plastic waterproof sealed electrical enclosure switch Junction box. Total size: 230 x 150 x 85mm/9.1" x 5.9" x 3.3"(L*W*H); Internal Size: 222 x 144 x 80mm/ 8.7" x 5.7" x 3.1"(L*W*H) This junction box provides complete protection against dust and splash water, the Ingress Protection Rating is: IP65 Fixing Hole Diameter: 5.4mm/0.21" Great for electronic projects, power supply units, student projects, amplifiers, etc.