They are made from 3mm diameter BS2056 302S26 stainless steel and work with both my RC45 6.00" magnesium wheels and the standard wheels.
These are NLA from Honda, list price was £160 each!
I used one for the first time at Cadwell on the PSPB weekend on the 14/15th August and was very happy with it. I've kept a few for myself but only had a small batch fabricated.
Price is £30 each plus recorded/tracked postage and I will happily send these internationally. (Three went to Germany last week and only cost £9 to post) Any questions, please ask.
