HISTORY:
My previous business for 25+ years was audio post production but as a side-line we had a quantity of equipment designated as “loaners” for up and coming bands/artists who had either struck misfortune (like some “low life” stealing their gear at a gig) or their existing equipment had simply failed on them, usually at the worst possible moment!
This spare part was found to be used in a number of different Behringer equipment, an example is the B300 Powered speaker systems but other Behringer equipment I know also used these.
This is a brand new component from our workshop spare parts supply

BEHRINGER – Rotary Potentiometer
Manufacturer: ALPS (Japan)
Part # 803-37241-06368
Description: 10K linear taper
12mm body
17.7mm shaft length
D shaft (flat spot on one side)
Shaft material: plastic (black)

Brand new, old stock – sealed in clear plastic