Set of 6 Color Coded Feeler Gauges. This set is comprised of what is generally considered to be the standard sizes: .050.040.034.024.010.0015 There are some sets that include both sizes in between a few of these and also a few larger sizes. In our opinion, in-between sizes are not necessary, as these 6 points of reference are all that is needed to create smooth and accurate curves. Having more in-between sized gauges can actually slow down the work and add stress and fatiugue from confusion. If a larger gauge is required for a large tenor or bari piece, please send us a message. You can see me, Chris Dragotta, an overview of the tools we offer, and the ongoing process of dialing in my old soprano pieces, here: https://www.youtube.com/channel/UC3C0zr3vyvTL7vX1-UQ2W8A