@Lisasali @ricky_enger You know, I'm not sure exactly, but I would think you might want to use the bigger nozzle if you have a bigger bag. But, I don't know beyond that. Doesn't hurt to experiment. I happened to choose the smaller nozzle because the bags are fairly small compared to larger ones you could get. Perhaps that's also why it took a little longer to suck all the airr out.