Perfect for your DIY CNC routers， mills， lathes<br />No more unwanted errors inyour machining work<br />Aluminum support rail withpre-drilled holes for ease of mounting<br /><br />Material: Carbon Steel<br />Size: 400x16mm / 15.7''x0.63''<br /><br />Package Include:<br />1 X SBR16--400mm Supported Rails<br />2 X SBR16UU Blcok Bearing<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!