Features:Product Name: Push Button StationModel: SAL-M03Main Color: Black and WhiteButton Hole Number: 3Button Hole Size: 22mm/ 0.86-inchScrew Hole Diameter: 5.6mm / 0.22-inchInner Effective Size: 115 x 54mm / 4.53-inch x 2.13-inch (L*W) Total Size: 150 x 71 x 65mm / 5.91-inch x 2.8-inch x 2.56-inch (L*W*H) Description:Surface Mounted, waterproof sealed plastic electrical enclosure switch push button box.Its main material is durable and impact-resistant plastic.Better waterproof and Anti-corrosion performance; protect your instruments even under an adverse environment.Button switch box can be installed on the wall or equipment, good for electronic projects, power supply units, projects, amplifiers, equipment control and signal indication, etc.We sell different size at the same time.