Here is a used set of Franklin Racing Products 10 spline quick change gears. They are set # 4A. 18/23 tooth count. They are 5.26 ratio with a 4.11 ring and pinion and 6.21 ratio with a 4.86 ring and pinion. I used these in a vintage dirt race car and they worked good, no issues. No chips or major damage on the teeth, good used condition. Any questions please ask