Twotrees MGN12H Double Linear Bearing Slide with Guide for 3D Printer CNC XYZ DIY Engraving Machine (Type H, 300 mm)

Super smooth movement, didn't need to be cleaned like I hear other linear rails do. They seem already nicely lubricated as well. Excellent packaging, so they came perfectly straight.

I built a 3D Printer and used these, they’re not Hiwin but they do the job and really good, i didn’t have to clean and re lube them like others, worked great right out of the box.

Came packaged great, smooth bearings and rails.

Nice rails, bearings move freely with no play.I would purchase again if needed.

sorry they arrived