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

Out of the box the rail was sticky and one of the blocks was nearly unusable. I rebuilt these rails shortly after receiving them with replacement balls and new lubricants. One of the blocks is perfect after rebuilding while the other is still rough. The bad block no longer becomes weged on the rail but likes to "cog"/stick every few cm. At this price point and quality I would say either go for cheeper alternatives (direct from Chinese sellers) or spend 2x to get the real thing.