Perfect for your DIY CNC routers， mills， lathes <br />No more unwanted errors inyour hining work<br />Aluminum support rail withpre-drilled holes for ease of mounting<br /><br />Description:<br />Material: Carbon Steel<br />Size: 300x8mm<br /><br />Package Include:<br />2 X 300mm Chrome Plated Shafts<br />4 X SCS8UU Linear Bearing Aluminum Blocks<br />4 X SK8 Fixed Bearings<br /><br />Note:<br />1.Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.<br />2.Due to the difference between different monitors， the picture may not reflect  the actual color of the item. Thank you!