Purchased and installed two copies for 1 year: good plastic Quality, effective downhill brake déclipsable for cleaning. Short but good but two caveats: - The same reference commanded a month apart arrived once with white caps fixing, the other times with chrome. This is the lottery. - But above all stability is VERY random. The fastening system is not suitable for all cups. I have one that does not move, the other that constantly stroll. Too bad but I can not recommend this model as the result is random