Feature: 1. Premium Material: Emergency stop switch cover is made of PC material, wear resistant, impact resistant, not easy to break, sturdy and durable. 2. Protection: Push button switch guard case protect button to prevent collision misoperation, helps lock push operation buttons. 3. Size: Diameter of hole at bottom of protective cover is 46mm/1.81in, semicircular fitting is 30.5mm/1.2in, and circular fitting is 22mm/0.87in. 4. Easy Installation: Simply install the base at the bottom of the emergency stop switch, can be locked and removed at will, convenient for using. 5. Wide Application: Push button switch protector is suitable for industry, chemical industry, electric power, petroleum, coal, flammable and explosive places. Specification: Item Type: Emergency Stop Switch Cover Material: PC Application: Suitable for industry, chemical industry, electric power, petroleum, coal, flammable and explosive places Mounting Hole Standard: Diameter of Hole at Bottom of Protective Cover: Approx. 46mm/1.81in Diameter of Hole at the Bottom of Semicircular Fitting: Approx. 30.5mm/1.2in Diameter of Bottom Hole of Circular Fitting: Approx. 22mm/0.87in Package List: 1 x Emergency Stop Switch Cover 1 x Circular Fitting 1 x Semicircular Fitting 1 x Double Sided Adhesive Tape