Fender Knob (4 pack) FM65R/210R

The Fender knob FM65R / 210R is a push‑on amplifier control knob used on Fender’s Frontman / FM amps. It is typically a black plastic knob (axial style) that slides directly onto the potentiometer shaft without additional fastening hardware. It is made to match Fender’s amp control aesthetic (smooth skirted shape) and to fit the standard shafts used in those models.