Feature:1. 2 Holes Design: There are 2 holes on the control station box, which can perfectly match with push button for easier operation.2. Better Control: Can be used for the remote control of AC contactors, electromagnetic starters, relays and so on, very practical.3. Practical Uses: Allows for application on ship, textile field, printing equipment, automation, crane, instrumentation and more.4. Great Material: The switch button case is made from premium ABS and PC materials,so it's waterproof and durable for long use.5. Easy to Install: Comes with a light weight and a compact size, the control casing enables convenient installation and working.Specification:Item Type: Push Button BoxMaterial: ABS, PCOverall Product Size: Approx. 130 x 71 x 67mm / 5.12 x 2.8 x 2.64inCentre Hole Aperture: Approx. 22.5mm / 0.89in, 2pcs. 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. .Package List:2 x Push Button Box Cover2 x Push Button Box Base8 x ScrewNote:Match the appropriate size before installation and use.