These are REFILLS for the new Ilmily Nuance Black pens. They offer black tinted colored inks from Pilot. The pens feature an elegant pen body designed for low vibration for a smooth writing experience. Select from 6 different colors from the drop down list.
Find their pen bodies here: https://www.paperpluscloth.com/products/pilot-ilmily-nuance-black-gel-pens