I have a pair of the (used but vgc) white standard nylon brushes for the HVS Host Freestyle System which I no longer have.
They were bought as a spare but they are in excellent condition as I never actually used them.
I'll take £50 cash for a quick sale as I know they retail for hundreds!
Maidenhead/Reading area
Paul
07787 838361 (please text if I fail to answer)