Features:10 million life span, long and durable serve for timeThe stroke is moderate, the feel is crisp, and the rebound is compact.brand new and high qualityMouse micro switch improve switch accuracy, smooth operation and smooth input experiencefor Ie3.0 Roller Io1.1 Ie4.0 mouse.Suitable for mid-to-high-end mouse usePackage Includes:5PCS x Micro Switch ButtonsSpecifications:Size: approx 6.2x6.2x6.7mm/0.24x0.24x0.26inStrength: 0.74NLife: 10Million TimesColor: BlackQuantity: 5PCSFeature: Brown Dotfor:Panasonic Micro Soft Ie3.0 Roller Io1.1 Ie4.0note:No retail package.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you