If you insist on adding decorative patterns to project blanks the old fashioned way on a lathe this part may be perfect for you. The inside diameter is sized to accept an 8mm brass tube from compatible pen or other wood working project kits. The outside diameter is 750 mils (19.0mm) and the cylinder is 5.1 inches (12.95cm) long.
Alumide is set as the default material since it can be a rather interesting material to work on a lathe. Several other materials such as WSF and detail plastics are also offered to fulfill your artistic visions. Note that dyed choices or color sandstone will only have thin layers of coloration on their surfaces.
The splotchy patterns you may see on the surface of the blank in any images shown above are due to fine grooves in the surface structure resulting in image pixelation effects and is not part of any color mapping. The part was uploaded with a solid light pink color simply as a way to visually categorize library parts.