Smooth, straight, lubricated with light oil, sealed, packed in cardboard tube.
The mgw12h linear guide is not running smoothly on the track. I am disappointed with the quality. I even did a maintenance, cleaning, but little improved. I have other mgn12h guides and they work very well. It's the second linear guide that I buy from a different store, and both don't work as expected. I bought it for my 3D printer and now I understand why the E3D English is putting original mgw12 Erwin guides.