Descriptions:The screws on the lid are made from plastic so will not rust, and easy to turn.Suitable for airport, subway station, button box, small terminal, signal chassis, sensor, measuring device, communication junction box and other equipment.This products Ingress Protection Rating is IP66.The package contains 2pcs metal screws which can be used for rail mounting.Specification:Product Name: Junction BoxInner Size: 72mm x 102mm x 82mm / 2.83in x 4.02in x 3.23in (L*W*H)Outer Size: 80mm x 110mm x 85mm / 3.15in x 4.33in x 3.35in (L*W*H)Mounting Hole Diameter: 4mm / 0.16inMounting Hole Distance: 62mm x 92mm / 2.44in x 3.62in(L*W)Ingress Protection Rating: IP66Certification: CE, RoHSPackage Content:1 x Junction Box, 4pcs x Plastic Screws, 2pcs x Metal Screws