This premium knob set will fit perfectly on the Tesi Alpha dual concentric pots, but not some CTS pots.  Check your pot dimensions.

Lower knob dimensions:

Inside shaft diameter: 8mm

Outside knob diameter: 19mm

Height: 12.5mm

Upper knob dimensions:

Inside shaft diameter: 6mm

Outside knob diameter: 15mm

Height: 14mm

Includes the allen wrench needed to set the knob in place.

Available in Chrome, Black, Cosmo Black (black nickel) and Gold.