Good Reputation bearing steel linear guide rod 17mm

Linear Shaft Bars and Bearings - Automotion Components
Hardened steel linear shafts for linear bearings - (h6 tolerance). Shaft support rail - 12mm diameter to 80mm diameter up to 6 metre long. 80mm diameter and the rail can be provided up to 6 metre long (for transportation purposes it is best
Linear Bearing: Business, Office & Industrial | eBay
Glide path: Linear guide. 1 pcs x 200x8mm Stainless Steel Lead Screw Rod with Nut(Nut diameter 8mm, pitch 2mm.). Mainly used for industrial automation