This is only a quick guide to buying Paper Till Rolls for your Cash Register; please be sure, specially if your Cash Register has a dot-matrix printer - only buy Grade 'A' rolls, your machine will need less service intervals and run much quicker if it uses a Paper Roll that doesn't create a great deal of dust. Some people will say it doesn't matter, but basically a dot matrix printer has a print head which zooms back and fourth, the shaft it runs on is oiled & greased for a reason. As soon as you start using Paper Rolls that create dust, the particals cling to the oil/grease drying in up - causing you printer to run dry and putting more strain on it.
Not sure if a seller is offering Grade 'A' rolls? Then just ask them.