Handmade slide bars, bottleneck. How about a set of 3? Sizes: Thin: Inner diameter φ18.5mm Thick: Inner diameter φ22.0mm Length: 71mm, conical shape. *Please allow for slight measurement errors. *All 3 are the same size. In my opinion, they are thicker and heavier than commercially available ones, allowing for longer vibrato and producing a beautiful sound. Handmade. There are some chips and scratches, but they have been rounded with a file and sandpaper. No claims and no returns accepted. Thank you for looking.