restoring a GP and my petrol rod is 21cm in length and its to long, trying to source one to fit! are these black ones you have shorter and what length are they? THANKS...

Our Black ones are 21.5mm long from under the arm or 23cm total. You can cut and modify one or we do our own stainless version which is adjustable but again 21 on the shortest setting, perhaps you have an oddball tap or the tank is wrong.

I have a question about "Petrol Tap Lever, standard, black plastic knob" I have a GP, and the lever I'm using is too long. Is this shorter?

To be honest without measuring yours I do not know, why not give me some measurements and I can look into it, I've put them on the shelves to day in the shop so know where they are.