I used to purchase these refills at a local chain store branch as I like to have a correction tape in my purse and this uses a retractable pen system. I was most distressed when that chain (the only place I had seen the refills in my area) stopped carrying them. What a pleasant surprise to find the item was not in fact discontinued and that I can purchase them (cheaper than I was paying 8 years ago) through an online outlet. The refills are easy to install and the overall product both handy and useful.