Description: The total length of the guide rail is 1200mm/47.24inch and consists of four parts: 0-300mm/0.00-11.81inch, 300-600mm/11.81-23.62inch, 600-900mm/23.62-35.43inch, 900-1200mm/35.43-47.24inch. The limit block is adjustable, you can adjust it easily for your different needs. A set for you to use, you can use this set for your and daily use. Made of aluminum alloy material, with the characteristics of not easy to rust and long service time. Easy to install and disassembly, the installation can be completed without too much complicated steps. Specification: Material: Aluminum Alloy Package Includes: 1 Piece Woodworking Universal Parallel Guide Rail Set Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!