SG (soft) compound
All are on or near the wear limiters so not suitable for (legal) road use, however would be fine for track use. I've been using them on my Westfield for sprinting only, aside from a couple of track-day stints at Snetterton last year.
A few years old now but they've always been stored inside. They were noticeably quicker than my newer Federal 595RSRs around Snet.
I've spilled a small amount of black paint on one of them but this would wear off pretty quickly!
Collection only from near Oxford (OX44). Not really sure what they're worth - offers around £80 before they go on eBay?
