These bearings are perfect for linear motion on your 3D Printer, CNC, or other applications. They come factory sealed in pairs and may require lubrication.

• Linear Motion 8 mm Shaft, 406 mm Length, Chrome Plated, Case Hardened, Metric
• O1 Tool Steel Round Rod, Polished Finish, Precision Ground, Annealed, Metric, 5 mm Diameter, 36" Length
• B00FM5SC2Q
• Linear Motion 8 mm Shaft, 330 mm Length, Chrome Plated, Case Hardened, Metric
• Endstop Microswitches for 3D Printer or CNC