Feature: 1. Effective Protection: Push the button in the cover, resuce wearing and tearing, make the switch longer life. 2. Easily Install: Just install the base on the bottom of the emergency stop switch and it can be locked and removed at will. 3. Easily Use: When you don't need to lock it, you can keep the base on site without affecting the operation at all. 4. PC Material : Plastic construction switch protector guard is special design for push button switch. 5. Applicable Scenarios: Suitable for industrial, chemical, electric power, petroleum, coal, flammable and explosive places. Specification: Item Type: Emergency Button Switch Cover Material: PC Model: BS-03 Applicable Scenarios: Suitable for Industrial, Chemical, Electric Power, Petroleum, Coal, Flammable and Explosive Places Mounting Hole Specifications: Bottom Hole Diameter of the Protective Cover: Approx. 46mm / 1.8in Diameter of the Bottom Hole of the Semi Circular Fitting: Approx. 30.5mm / 1.2in Diameter of the Bottom Hole of the Circular Fitting: Approx. 22mm / 0.9in. Package List: 10 x Emergency Button Switch Cover10 x Round Accessories10 x Semicircular Accessories10 x Double Sided Stickers