Dear Guy,
Here goes a picture of well-assorted cartomizers available on our site. Does the picture look nice to you?
D or d stands for diameter.
If you are interested in them, please check Simple Guide to Cartomizers for details.
if you have any questions, please feel free to let me know here or email to support@healthcabin.net.
we will be happy to help you choose right cartomizes.
Health Cabin