1、5 Hole Design: There are 5 holes on the control box, which perfectly match the buttons, making the operation more convenient. 2、Better Control: Can be used for remote control of AC contactors, electromagnetic starters, relays, etc., very practical. 3、Practical Use: Can be applied to ships, textile fields, printing equipment, automation, cranes, instrumentation, etc. 4、Premium Material: The switch button case is made of premium ABS and PC materials, so it is waterproof and durable for long time use. 5、Easy to Install: The control box is light in weight and small in size, making both the installation and operation much easier. Item Type: Push Button Box Material: ABS, PC Overall Product Size: Approx. 25 x 7 x 6.7cm / 9.84 x 2.76 x 2.64in Centre Hole Aperture: Approx. 22.5mm / 0.89in, 5pcs. Side Hole Aperture: Approx. 21.8mm / 0.86in, 2pcs. Bottom Hole Diameter: Approx. 19mm / 0.75in, 2pcs. Mounting Hole Aperture: Approx. 4.8mm / 0.19in, 4pcs. 1 x Push Button Box Cover 1 x Push Button Box Base 4 x Screw