Ideal festival gift for keyboard enthusiasts and tech lovers. Package contents: two and two butts. Materials and build: PC and silicone; lightweight, solid and sturdy. Compatibility: designed for MX structure mechanical keyboards. Benefits and features: Lightweight and durable construction for reliable use with MX keyboards. Practical accessory that complements and supports MX mechanical keyboard setups. Easy to handle and store due to compact, sturdy materials. Use scenarios: Scenario 1: Gifting during holidays or special occasions to a keyboard hobbyist or techminded friend. Scenario 2: Replacing or upgrading components on MX structure mechanical keyboards to refresh a workstation or gaming rig. Scenario 3: Using in home, office, or onthego setups where a durable, lightweight keyboard accessory is advantageous. Note: 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.