2pcs linear shaft 3d printer parts 5mm linear shaf... – Grandado Humanization Design: Chamfer on both ends, easier to install linear bearings and won't hurt fingers when installing it We could provide all the customization: any length, threading, and other end processing, you could get some information from pic 5, if you have needs, please message us The case hardness could be reach to 58-64 HRC., Durable and corrosion-resistant High Precision Linear Rail 6Pcs 12mm X 762mm Linear Rod, Coavoo Diameter 12mm Case Hardened Chrome Plated Smooth Linear 3D Printer Rod About this item 2pcs Diameter 12mm chrome linear shaft steel smooth rod L: 58.27 inch /1480mm We could provide all the customization: any length, threading, and other end processing, you could get some information from pic 2, if you have needs, please message us, thank you We can customise the linear rail, including the length and finishing. - We can process the end of the rail as you need, some examples you can see the image 4 10Pcs 25mm x 770mm Linear Rod, Coavoo Diameter 25mm Case Hardened Chrome Plated Smooth Linear Motion Rod Shaft Guide Rail - Metric h8 Tolerance L: 30.31 inch / 770mm We offer a full range of different diameters of linear rail shaft bars: 5, 6, 8, 10, 12, 13, 14, 16, 20, 25, 30, 35, 40, 50 mm and so on