The BOX Two Prime 9 Cassette delivers long service life and extra range. All cogs are stamped from steel and the larger ones are pinned to alloy spiders.Rated for eBike useCogs pinned to lightweight spidersUltra-wide ratio with consistent progressionPrime 9 technologyCompatible with HG freehub bodiesItem SpecificationsCassette Body TypeShimano HGCogs12-14-16-18-22-28-34-42-50ColorBlackDefined ColorBlackDesigned for ebikeYesDrivetrain Speeds9Range12-50 BOX Two Prime 9 Cassette Cassettes UPC: 616043832845