Transparent tip provides easy viewing of ink flow in the tube reservoir. The specialized plastic used for a thin profile tip, while maintaining exceptional durability and heat resistance. The thin profile tip minimizes the distance between the needle and the skin for more precise artwork. All tubes are made with the most precise injection molding technology, no flashes exist, so that maximum ink flow and consistent needle support. Tubes individually packaged and sterilized by Ethylene Oxide Gas Available sizes: Round: 3R, 5R, 7R, 9R, 11R, 14R Angled Round: 3AR, 5AR, 7AR, 9AR, 11AR, 14AR Diamond: 3D, 5D, 7D, 9D, 11D, 14D Magnum: 5M, 7M, 9M, 11M, 13M, 15M Open Magnum: 5OM, 7OM, 9OM, 13OM, 15OM