Reporting question for Knobs - Marshall, for Amplifiers, push-on

Product:
Knobs - Marshall, for Amplifiers, push-on

Question:
I have a Marshall valvestate 40v Model 8040 what size tone knob will fit ? Thanks Declan

Answer:
If the pots in your amp have a split, knurled shaft, these knobs will work. If your amp uses pots with a solid shaft you will need knobs from the following link: https://www.amplifiedparts.com/products/knob-marshall-set-screw