What paper for HTK?

[I.B. Washincars]

I have an HTK pay station for one of my autos and have run out of paper. We don't have a Staples or Office Depot nearby and need to get the local store to order it. We don't really know if it is a standard size and were told by someone at Hamilton that it had to be a large core size or something to that effect. I would feel better if I knew exactly what I needed to have them get for me, the manual was not much help.