MX3 Cassette10-speed Wide Ratio6 Sprockets on 2 Alloy Spider CarriersA7075 Largest SprocketAlloy Lockring and SpacersRatios:(11t-42t): 11-13-15-18-21-24-28-32-36-42or(11t-40t): 11-13-15-18-21-24-28-32-36-40Finish : Champagne or Black ChromeWeight: 387g (11-42) 378g (11-40)MBR's Hot Stuff Jan 2016:"If you need a wide-range cassette for your 10-speed bike, look no further than the MX-3 SunRace. It's cheaper than most gear extender sprockets".Included in What MTB's 2015 Gear of the Year.