Check the listing for details. 510 Cartridge Holder - 9 Spaces. Condition: New. Listed at 9.99 USD. 3d Printed 510 Cartridge and Battery Pen Holder.Makes storing cartridges much easier and keeps them in an upright position to ensure oil is formed at the heating element. This print has triple wall support and is a very sturdy plastic object. Empty cartridge not included.Each of the 9 holding spaces is 12mm wide so they can accommodate most 510 cartridges, 1ml glass test tubes and batteries. Designz3D Specializes in quality 3D printing and laser engraving. Our items are competitive but are guaranteed to use more filament and be of higher quality then our competitors.3d Printed 510 Cartridge and Battery Pen Holder.Makes storing cartridges much easier and keeps them in an upright position to ensure oil is formed at the heating element. This print has triple wall support and is a very sturdy plastic object. Empty cartridge not included.Each of the 9 holding spaces is 12mm wide so they can accommodate most 510 cartridges, 1ml glass test tubes and batteries. Designz3D Specializes in quality 3D printing and laser engraving. Our items are competitive but are guaranteed to use more filament and be of higher quality then our competitors.