Covers Controls. Prevents Unwanted Adjustment. Fits Most EquipmentMaterial: Steel Dimensions: F207: 1U- 44 x 482 x 25mm F208: 2U- 88 x 482 x 25mm F209: 3U- 132 x 482 x 25mm. Vented security covers to place over 19″ panels preventing damage and unwanted fiddling with controls.. rack security-secure rack vent