Flex Solid Rubber
- 3.5mm – All Color Stock.
- 6.0mm – (6) indicates stock color. Others colors special order (mins apply) – note that the 6 needs to be in a color that is more visible. The white is hard to see on some colors.
- 9.0mm – Special Order (mins apply).
- 6.5 and 9.5mm Acoustisport System – All Colors Stock.