[ SIZE INFO ] Overall external size: 3.9x3.9x2.3inch(100x100x60mm); internal size: 3.7x3.7x2.2inch(93x93x55mm) Please refer to picture for specific data. [WATERPROOF] Electrical box is IP67 waterproof rated, , ensuring that the electrical components inside are safeguarded from moisture, rain, and other external elements. Seals with rubber gasket to offer ideal protection for electronics. [DURABLE CONSTRUCTION] Aluminum alloy material is highly resistant to corrosion, making these junction boxes ideal for outdoor. Also sturdy enough to have a longer lifespan, reducing the need for frequent replacements. [EASY INSTALLATION] Internal mounting holesare threaded making installation straightforward for panels, PCB boards, wiring configurations for DIY projects. [VERSATILITY] Metal electrical enclosure is versatile and can be used in a wide range of applications such as outdoor lighting, industrial wiring, solar power systems, and more.