What I got was unperfed 16mm Aristachrome 400, which I assume was slit from old bulk rolls from Freestyle. I don't think he has many single perf films for sale though. Your best option for 16mm single perf is getting short ends from cine supply houses like Film Emporium (www.tapesuperstore.com). It is much cheaper per foot, and is most likely the freshest you can buy.