This knob has a 16mm master thread and comes with your choice of one reducer.

YOU MUST PICK ONE

Reducer sizes available are 5/16 x 18, 5/16 x 24, 3/8 x 16, 3/8 x 24, 7/16 x 14, 7/16 x 20, 1/2 x 20, 1/2 x 13. Metric 16mm x 1.50, 12mm x 1.75. 12mm x 1.25, 10mm x 1.50, 10mm x 1.25, 8mm x 1.25

We also make knobs with custom colors and logos for any type use.