This dilator set has 14 individually sized sounds in it. Each piece is 8" long and has a flat end. All 14 pieces can only be used from one side as the other side is flat. The flat side can be used to touch the tuning forks or attach any other vibrating toy. This set comes in a case that zips up. Approximate sizes: 1.6/2.0, 3/4, 5/6, 7/8, 9/10, 11/12, 13/14, 15/16 and 17/18mm
