From The Manufacturer
Indicator Knob, Black W/White Arrow, 1-7/8" Dia, 1/4" Hole, With 2 Set Screws., Blodgett Ac-500 Xcel, Bcx-14, Bx-14, Cnvx-14, Dfg-100, Dfg-100 Xcel, Dfg-200, Mark V Xcel Series,

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| Manufacturer | AllPoints |
| Model Number | 221622 |
| Weight | 1.12 oz |
| Width | 0.37″ |
| Depth | 1.87″ |
| Height | 0.5″ |