Those knobs are used on the B737 flight deck.
Knobs comes with exactly the same inbus screws as used on the real knob. Perfectly finished in injected plastic and painted in gray.
* Lower knob: Base diameter 22,15mm. Height 13,2mm. Axis hole diameter 6,3mm.
* Upper knob: Base diameter 16mm. Height 14mm. Axis hole diameter 3mm.
* Total height: 26,9mm.