Phenolic tray and mouse platform, durable, vibration-free Viscoflex memory foam contoured, positive angled wrist support Ball bearing glides, lock out feature, smooth action, low profile Height adjustable to 6", rotates, positive/negative tilt Tray dimensions: 20" W x 10" D x 1" H Track: 21" D x 9" W x 4.5" H Weight: 21 lbs. Mouse platform: 8.5" x 8.5" wide