Specifications: Made of premium ABS and metal, the shaft is durable to use. It is used to replace mechanical keyboard shaft and change mechanical keyboard pressing touch. Black axis is mainly used in gaming keyboards. Red shaft is the lightest pressure among for Cherry 3 shafts. Brown axis has a lighter pressure in grams than the black shaft, making it easier to use. Green axis is suitable for typing. Item Name: Keyboard Axis Button Material: ABS, Metal Quantity: 16 Black Axis: Linear Switch, Performance 60cn Red Axis: Linear Switch, Driving Force 45 cn Green Axis: Tactile Switch and Click, Working Force is 50cn Brown Axis: Touch the Switch, Do Not Click, 45 cn, Soft Touch Features: Sensitive, Durable to Use, Keyboard Accessory Single Size: 3cm x 2cm x 1cm/1.18" x 0.79" x 0.39" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. These buttons can use 3mm 1.8mm, 2x3x4mm LED. If you want to use 4 RGB nails, you must dig out 2 holes or replace the button cover. Package Includes: 16 x Keyboard Axis Buttons (Keyboard and Key Detector Not Included)