Heavy-Duty Motorcycle & small engine Valve Spring Compressor.
It will compress valves for the following sizes:
1) Size: 30mm (OD.) - 27.5mm (ID.)
2) Size: 25mm-23.5mm
3) Size: 23mm-21.5mm
4) Size: 19mm-16.5mm
5) Size: 16mm-13.5mm
Each collet length is 1 & 3/4"
Comes with five spring compressor adapters and two posts (with thread length 70mm and 90mm)