Features: Good hand feel and 60 million clicks long lifespan. As long as your original mouse is a rectangular three-pin straight foot micro switch, it's universal. Sharp feel, medium-short stroke, crisp rebound. Less delay than similar products. The red dot button has a 60M lifespan, longer than the standard 50M, and feels sharp and very comfortable! The D2FC-FK red dot micro switch is sharper, improving switch accuracy and smooth operation. Specifications: Model: D2FC-FK Mouse Micro Switches Lifespan: 60 million clicks Quantity: 4PCS Material: Plastic Package Size: As pictured Force: 0.74N Dot: Red Dot Contact: 3 Pins Note: Due to lighting effects and shooting angles, there may be some tolerances in the product. Please understand. Please allow 0-2mm error due to manual measurement. Package Includes: 4pcs Micro Switches (without retail packaging)