
Updated my 3D printer to use these linear rails. Arrived clean and smooth. Initially 2 of them were not flush or fully linear in terms of extrusion but went flat immediately after installation. I bought some "Super Grease" to apply after installation. I can recommend these.

Iverntech MGN12H Linear Rail Guide With Stainless Steel Carriage Blocks - 700Mm Length For 3D Printer And CNC Machine
9 Review

Iverntech MGN12 700Mm Linear Rail Guide With MGN12H Stainless Steel Carriage Block For 3D Printer And CNC Parts
11 Review

Iverntech 400Mm MGN12 Linear Rail Guide With 2 Black Stainless Steel MGN12H Carriage Blocks For CNC Parts And 3D Printer Upgrades
8 Review

Upgrade Your Furniture With Happybuy 10 Inch Stroke Electric Actuators - Heavy Duty 6000N DC 12V With Mounting Bracket For Recliner, TV Table, Lift, Massage Bed, And Sofa
9 Review