Logisys SR30 3-Section Industrial Grade Ball Bearing Sliding Rail Kit - Extends to ~30"! Logisys SR30 3-Section Industrial Grade Ball Bearing Sliding Rail Kit General Features: Designed to fit most standard rackmount chassis and cabinets Extends up to approximately 30-inches (when used with 18-inch deep cabinet) Adjustable arm length up to 45-inches Four (4) 8 x 1-inch L-shaped brackets included