Descriptions:Made of ABS, durable for use, and easy to installAlso Dustproof, Anti-UV and Anti-corrosion performance; protect your instruments even under the adverse environment.Suitable for airport, subway station, button box, small terminal, signal chassis, sensor, measuring device, communication junction box and other equipment.Specification:Product Name: Junction BoxOuter Size: 40 x 20 x 11mm/1.57 x 0.79 x 0.43inch(L*W*H)Inner Size: 35 x 16 x 8mm/1.38 x 0.63 x 0.31inch(L*W*H)Hole Size:6 x 5mm/0.24 x 0.2inch(L*W)Package Content:1 x Junction Box