Material: 86 Type Fan Speed Controller is made from sturdy pp material, ensuring long-last performance and reliability in everyday use Product Dimensions: With a size of 8.6cmx8.6cm and an installation hole diameter of 6cm, it fits seamlessly into most standard setups Wall Mount Design: Designed for surface mounting, this ceiling fan speed controller does not require an embedded box, making installation straightforward and convenient Effortless Control: Features a comfortable rotary knob that allows for easy and smooth adjustment of fan speed, with clear numerical indicators for each of the five speed settings Compatibility: Capable of handling high power devices, five-speed speed regulator is suitable for various fans and appliances up to 500W, including range hoods Specification: Material: PP Size Chart: 8.6cmx8.6cm/3.39inchx3.39inch Installation Hole Diameter: 6cm/2.36inch Package Includes: 1 Piece 86 Type Fan Speed Controller Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.