2pcs Diameter 6mm chrome linear shaft steel smooth rod L: 31.89 inch /810mm; We could provide all the customization The case hardness could be reach to 58-64 HRC., Durable and corrosion-resistant Humanization Design: Chamfer on both ends, easier to install linear bearings and won't hurt fingers when installing it 2pcs Diameter 6mm x 440mm chrome linear shaft steel straight smooth sturdy rod bar, Length (0., 24 x 17., 32) Straight Round Steel Shaft For CNC Shaft Guide 6mm X 440mm Case Hardened Chrome Plated For 3d Printer Diy Cnc Metric H8 Tolerance 2pcs Linear Motion Rod Durable and corrosion resistant. HIGH ACCURACY: Diameter 6mm, tolerance -0.01mm to -0.02mm (6mm - 6.98mm), length 600mm, tolerance ±0.5... We can customise the linear rail, including the length and finishing. Brand: CoavooMaterial: High Quality Carbon Steel (C45#)Hardness: 58-64 HRCSurface Hard-thickness: 0., 8 – 2., 5mmSurface Roughness: 0., 8S – 1., 6SStraightness: Below 5μm/100mmSurface Chrome Thickness: 15um-20umSurface Finish Quality: Ra 0., 8Color: SilverThis package includes: 2Pcs 6mm x 440mm Linear Rail Shaft RodsbPlease Note:- We can offer the linear motion rail shaft rod in any length, pls contact us. Dual Action Guitar Truss Rod 440mm - RD003 | Reverb UK 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