The Sparkfun COM-14889 is a simple black knob that connects to the small and medium sized linear slide potentiometers by friction insertion.
The Sparkfun COM-11620 is a small simple PCB mount linear taper slide potentiometer rated at 10KOhm and 0.1W. with a travel distance of 20mm.
1/2 Watt Square, Top Adjustment, Y Layout, 3/8" Square, Single Turn Cermet Potentiometer. Ohms: 10K.
This is a 20-piece set of assorted 16mm diameter 6mm shaft right-angle PCB Mount Linear WH148 Potentiometers which comes with equivalent quantities of multiple-colored knobs and washers.
Minimum quantity for "15000R16, 15000uf 16V Electrolytic Radial Capacitor" is 5.
Minimum quantity for "33000R16, 33000uf 16V Electrolytic Radial Capacitor" is 5.
Minimum quantity for "33000R6.3, 33000uf 6.3V Electrolytic Radial Capacitor" is 5.
Minimum quantity for "CM103-600 Radial .01uf 630V Ceramic Monolithic Capacitor, 0.200" Spacing" is 10.