Increase the height of your 4th Axis module to hold larger stock.
Maximum size stock unmodified: 92mm
Max with 9mm riser: 110mm
Max with 15mm riser: 122mm
Compatibility:
Original Carvera: 9 or 15mm
Carvera Air: 9mm only
Z1: Not compatible
Note: This kit does nothing to increase your existing workholding clamping range. Consider replacing