Do you often drop things on the floor because of lack of space at your desk, and want to take a break after get off work but have no space? This expansion board will perfectly solve your problem.Special Conquest:1. Increaseable work area2. Durable3. Easy installation4. Full-size keyboard surface-appropriate possession, full-size keyboard, mouse possession, and other distributionStandard:Product name: Desktop environment boardProduct size:55x24 centimeters / 21.7x9.4 English size64x24cm / 25.2x9.4in75x24 centimeters / 29.5x9.4 English sizeUse: Desktop environmentMaterial: Environmental density board / multi-layered actual wood boardNote: Manual surveying meeting error, error, request and actuality.