Four Cooler Master 80mm Ball Bearing Case Fans – Digital LCD Temperature Display – Equipped with Temperature Sensors To Check Any Part Temperature – Display Screen Shows Inner Temperature For Cabinet Or Other Multimedia Centers – Durable Metal Construction – Mounting Holes (Inner Width): 17 1/2″ Wide (From Hole to Hole) – Mounting Holes (Outer Width): 18 5/8″ Wide (From Hole to Hole) – Mounting Holes (Inner Height): 2 11/16″ High (From Hole to Hole) – Mounting Holes (Outer Height): 3 3/16″ High (From Hole to Hole) – Installation Hardware Screws Included – Power 110V – 60HZ – Dimensions: 19″ X 4.3″ – Weight: 3.5 LBS