Handmade slide bars / bottle necks crafted from repurposed wine bottles. How about a set of three? Sizes: Small inner diameter: φ18.5mm Large inner diameter: φ22.0mm Lengths: 75mm, 72mm, 62mm - all conical. *Please allow for slight measurement variations. *The large inner diameter may vary slightly depending on the length. In my opinion, they are thicker and heavier than commercially available ones, allowing for sustained vibrato and producing a beautiful sound. These are handmade. There may be some minor imperfections. The edges have been rounded with files and sandpaper. No claims and no returns. Thank you for looking.