CTS stacked concentric audio pots, intended for pickguard mounting. Pot is 1 and 15/16 inches total height. Distance from bottom of pot to the bottom of the threaded portion is 7/8 inch.
Bottom knob controls - 500K, diameter 3/16 inch, 4.77 mm
Top knob controls - 250K, diameter .265 inch, 6.75 mm.