Is it wrong...

[T 20]

Sorry, but did I read that right.

Are they made of nylon or carbon fibre for example.

Does the reduced weight of such a piston make for a much smoother action?

Or did you mean their own metal pistons with a synthetic seal?

Sorted it for you Arthur

[Arthur John Smithsplease]

Thanks a lot.

Thought it was probably a slip of the pen.

But you never know.