4-Pack Black Generic Design Universal Control Knob With 12 Adapters Generic knob meant to fit several applications Knob is approx 1 5/8" diameter (42mm) & approx 15/16" tall (24.5mm) Each knob includes 3 adapters ranging approx 1/4" to 1/3" (6mm - 8mm) inside diameter "D" posts Knobs have no wording or text on them - plain solid color PLEASE NOTE THESE KNOBS ARE FAIRLY SMALL SO PLEASE CHECK THE DESCRIPTION BEFORE YOU BUY FOR SIZES