This is an SCI-quality 3D print file (442 kB). Scale model enthusiasts can use this file to "push the edge" with the new wave of 3D printing. This is a standard file for use on basically any new 3D printer out there. Developed, tested and recommended for use on an inexpensive FDM (Fused Deposition Modeling) printer. No support material is required. When printed in plastic, this piece replaces the laser-cut paper halves of the Keck Telescope SCI Kit Upper Telescope Tube Assembly.