Item Name: Linear Rail Slide Kits 8mm 10mm 12mm 16mm Diameter 1 Set Material: Carbon Steel, Aluminum Alloy, Bearing Steel Measurement System: Metric PCs in Item: 1 Set: Linear Rail x 1, Linear Rail Stands x 2, Sliding Blocks x 2 Manufacturer: N/A, Made in China Notes: Specify exact rod length in the ‘Order Notes’ when checking out.