Packing: 1pcs Material: ABS plastic Size:73mm(2.87in)x67mm(2.64in), button hole size 22mm(0.87in) Number of button holes:1 Sturdy, highly durable and environmentally safe, long service life Used to house an electrical device such as a switch or socket outlet Surface mounted, waterproof sealed plastic electrical enclosure switch button box Improved corrosion resistance to protect your instruments even in harsh environments Can be used in control stations to protect pushbutton switches Suitable for industrial control equipment circuits for controlling electromagnetic starters, contactors, relays and other circuits Suitable for electronic engineering, power supply units, engineering, amplifiers, equipment control and signaling instructions