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: 138*91*36mm(5.43*3.58*1.42inch)(L*W*H)Inner Size: 133*87*28mm(5.24*3.43*1.1inch)(L*W*H)Screw Installation Diameter: 3mm*0.12inch (the screw is not inclued, need to buy extra)Package Content:1 x Junction Box