Forgotten I had these as i sold my B8 S4 over a year ago! Just found them in the garage (ironically as I was digging out tools to fit spacers to my Tiguan and my Abarth Competizione!). Started out life as 15mm all around but I found I got slight rubbing. Was going to sell them and buy new but someone on here suggested getting them machined, which I did professionally (obviously it was the rear surface of them that got machined!!) hence the now 12mm & 10mm and they sat perfectly on the hubs. This size is generally what I found people on here recommend. You might notice from the pics that only 2 of the bolts are H&R, never mattered to me and didn't peform differently in anyway, never had any issues with them when they were on my car, no rubbing, horrible noises etc. Would prefer collection from Epsom in Surrey, £100 for the lot. Extra £10 for UK mainland delivery, insured and signed for.