microSHIFT H07 Cassette - 7 Speed, 12-32t, Silver, Nickel PlatedmicroSHIFT's H07 Series cassettes are designed to deliver maximum durability. With all steel construction and multi stage heat treatment, these cassettes will stand up to whatever you can throw at them, whether its high torque E bike usage or just good old fashioned mashing Continuously molded cogs are straighter than stamped steel, resulting in more consistent, predictable shifting performance Precision ramps and chamfers for rapid chain movement