"He who marches out of step hears another drum." ~ Ken Kesey
we use the 80, 150 and 180. It is a special purpose mesh and has been too fragile for our work conditions when we tried to use it more. It sees action once or twice a week now. Can't tell you much more than it does work well and we are very happy to have it, but I would not replace all our mesh with it (would not even be an option, we would bust a screen or two a day if we did).pierre