Handmade slide bars / bottleneck made from processed wine bottles. How about a set of 3? Sizes: Thin inner diameter: φ18.5mm Thick inner diameter: φ22.0mm Lengths: 77mm, 75mm, 68mm - all cone-shaped. *Please allow for slight measurement errors. *The thick inner diameter varies slightly depending on the length. In my opinion, they are thicker and heavier than commercially available ones, allowing for a longer vibrato and a beautiful sound. Handmade. There may be some minor chips. R-shaped processing with files and sandpaper. No claims and no returns. Thank you for looking.