Specification:*Material: Zinc Alloy* Color: Silver* Size: 38*19mm* Hole size: 6mm diameterPackage Included:* List: 4* Rotary SwitchesNotes:1. Due to various factors such as monitor brightness, light brightness, etc., the actual color of the product may be slightly different from the picture displayed on the website.2. Please allow for slight manual measurement deviations in the data.