3-Pack InkGuard™ Refills

This ink is brilliant at concealing adresses on sticky labels sent through the post. It really takes the stress out of obliterating names & personal details. The smaller ink roller made like work of sticky & impossible to move prescription labels. I would highly recommend this product.

No6thing of note. Only used a couple of times

Need direction on how to refill, I'm sure it is simple but not sure how to do .