LM6UU\/LM8UU\/LM10UU Linear Bearing Steel 3D Printer AccessoriesFeature:Material: Bearing SteelProduct weight: LM6UU: 3g\/ LM8UU: 13g\/ LM10UU: 23gType: LM6UU\/LM8UU\/LM10UU (Optional)Note: The color of the item may vary slightly due to photography and your own computerPlease allow 1-3mm differences due to manual measurementPackage includes:1 x 3D Printer Linear Bearing