Upgraded Reserved Hole DesignThis junction box has 12 reserved holes with a diameter of 1.4in/36mm. You can easily drill holes without cracks to meet your all kinds of DIY projects IP65 Waterproof CertificatedBuilt-in black sealing waterproof ring,offer a superior waterproof performance to keep raindrops, splash, dust, oil, snow etc. away effectively. widely used for both indoor and outdoor applications. Sturdy Electrical BoxMade of high-quality ABS material which has longer serve time and superior in impact resistance. High quality junction box can protect your equipment well in harsh environments. Package Content 1x Junction Box including 4 x Self-tapping Screws(M3*15) for fixing the cover; 2 x M24 Cable Gland; 2 x M25 Rubber Stopper; 4x Self-tapping Screws (M5*40) for fixing on the wall; 4x Expansion Bolt. You can easily use the included accessories to complete your all DIY projects. EXTERNAL SIZE- 10" x 7.9" x 3.1"/ 255 x 200 x 80mm(L*W*H);INTERNAL SI