Pen
thingiverse
A three-piece pen consisting of a tip, body, and cap utilizes a cross-replaceable refill. The Cross refill 8910-1 is specifically used in this type of pen. https://www.amazon.com/Cross-Rolling-Refill-Black-8910-1/dp/B004Q4K1FU/ref=mp_s_a_1_1?ie=UTF8&qid=1547961155&sr=8-1&pi=AC_SX236_SY340_QL65&keywords=cross+8910-1+refill&dpPl=1&dpID=41934iqJlYL&ref=plSrch
Download Model from thingiverse
With this file you will be able to print Pen with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Pen .