1、INCLUDED PARTS: Including the upper cover and base of the button box, and equipped with mounting screws, simple in structure, easy to install and remove. 2、PLASTIC MATERIAL: The waterproof button switch box is made of ABS and PC plastic, with good toughness, wear and aging resistance, has a long service life. 3、MULTIPLE USAGES: Can remotely control AC contactors, electromagnetic starters or relays, with stable performance and a wide range of applications. 4、APPLICABLE SCENES: This push button control box set is widely used in automatic door openers and exit buttons, etc., suitable for large outdoor push buttons. 5、EASY TO INSTALL: The button switch box has standard hole diameter, which is easy to connect, rainproof and no leakage, safe and reliable in operation. 2 x Button Box Upper Cover2 x Button Box Base8 x Screws Item Type: Push Button BoxMaterial: ABS, PCOverall Product Size: Approx. 75.5 x 71 x 65.5mm / 3 x 2.8 x 2.6inCenter Hole Diameter: Approx. 22.5mm / 0.89inSide Hole Diameter: Approx. 21.8mm / 0.86in (2pcs)Bottom Hole Diameter: Approx. 19mm / 0.75in (2pcs)Mounting Hole Diameter: Approx. 4.8mm / 0.19in (2pcs)