Needle tips carry a stated pin count and a traditional cartridge face. Nano tips are labelled as Nano Round, Nano-S, Nano-R, Nano 3D and similar names depending on the series. They are not interchangeable with a numbered pin tip of the same brand.
On product pages, nano options sit alongside pin-count options for the same pen. Check the exact label on your current pack or on the tip still fitted to the pen before reordering. A worn nano face can look flat in photos — if the print on the blister is readable, use that wording.
If your customer only says "nano," ask which nano style they last used. Sending a clear pack photo with your sourcing request saves a round of corrections later.