19 Inch Locking Rack Panel. Clears Most Panel Controls. Panel Displays can Can Still Be Seen. Prevents Unwanted Adjustment. Secures Rack-Mounted EquipmentMaterial: Steel CLS-149- 1U- 44 x 482 x 40mm CLS-170- 2U- 88 x 482 x 40mm CLS-171- 3U- 132 x 482 x 40mm CLS-172- 4U- 176 x 482 x 40mm. These secure locking rack panels will fit over 19″ equipment mounted in a rack. The front panel is clear so that settings & readings can still be seen easily- but can’t be changed without a key. Manufactured from a tough black powder coated steel- they are an ideal choice for securing a wide range of rack mounted equipment.. Buy Secure Locking Rack Panels- 1U to 4U from Terralec Ltd- With Fast UK Delivery.. Rack Security Panel- Locking Rackmount Panel