100% brand new and high qualityMade of high-quality aluminum alloy materials, CNC machined, practical and durable.Guide Clamp Angle: Accurate 90 degrees.New connection clip, stable and safe. Horizontal distance can be adjusted.We offer 3 kinds optional, you can choose one or more according to your needs.Greatly improve the accuracy, save time and convenient for operation. Specifications:Material: Aluminum Alloy Fit for Marble Machine Guide Rail Size: approx 320x90mm/12.60x3.54 inches Fit for Double Layer Guide Rail Size: approx 350x90mm/13.78x3.54 inches Fit for M-akita and F-estool Rail Size: approx 370x90mm/14.57x3.54 inches Type: Fit for Marble Machine Guide Rail/Fit for Double Layer Guide Rail/Fit for M-akita and F-estool Rail Note:1.Please allow 1-3cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes:1x Guide Rail Clamp