ReliaBot 2PCs 8mm x 150mm (.315 x 5.9 inches) Case Hardened Chrome Plated Linear Motion Rod Shaft Guide - Metric h8 Tolerance
Brand: ReliaBot

Packing list:
2 * Diameter 8mm Length 150mm Linear Motion Rod

The material is carbon steel, which is very suitable for linear motion rod.
The surface has been chrome plated to enhance the hardness.
Chamfer on both ends, easier to install linear bearings and won't hurt fingers when installing it.
Diameter 8mm, tolerance -0.005mm to -0.03mm ( 7.995mm - 7.97mm)
Length 150mm, tolerance ± 0.5mm ( 149.5mm - 150.5mm )