Wide ratio cassette featuring 6 steel and aluminum cassettes on 2 anodized aluminum spiders with aluminum spacers and lockring Sprockets 1 - 9 are Hi-Tensile steel while the 10th is aluminum Featuring Sunrace`s Fluid Drive Plus technology for precsion shifting 11-46t 10sp 11,13,15,18,21,24,28,34,40,46 Black 436gUPC/EAN/GTIN: 4710944256260