Idler for ethirteen LG1+. Broke my whole lower chain guide on my DH, could find the roller cage but not the idler. Use with a simple 5x20 mm nut (no bearing as i don't use the chain that much, just grease well), and 0-2 washers to account for your printer's tolerances. If you need a version with a bearing or some other change, just remix or request it.