Transparent Cover: Transparent cover, you can clearly check the switch , easy to use Packaging: 1x knob cover Simple Installation: The design is simple, just install it to the switch button, use is labor saving Durable: Made of high quality materials, it is strong and durable and can be used for a long time Application: Suitable for construction, logistics, chemical industry, machinery manufacturing and other fields Description: - Packaging: 1x knob cover - Durable: Made of high quality materials, it is strong and durable and can be used for a long time - Transparent Cover: Transparent cover, you can clearly check the switch , easy to use - Simple Installation: The design is simple, just install it to the switch button, use is labor saving - Application: Suitable for construction, logistics, chemical industry, machinery manufacturing and other fields Size Chart: Style A: Outer diameter 49.6mm, inner diameter 22mm, height 31.6mm, suitable for 22m diameter switch buttons Style B: outer diameter 49.6mm, inner diameter 25mm, height 31.6mm, suitable for 25cm diameter switch buttons Style C: outer diameter 49.6mm, inner diameter 30mm, height 31.6mm, suitable for 30cm diameter switch buttons Package Includes: 1 Knob Cover Note: Please allow slightly errors due to manual measurement and different monitors.