You would need a 9 speed shifter (the shifter does the actual indexing of the cable movements). It appears Microshift does make 11 speed all steel cassettes, I'm looking for a place to buy them now.m@Roberston, if our derailleur/shifter is for an 11sp how does this 9sp cassette work? I like the price and would be fine with 9 speeds.
H-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 it's high torque E-bike usage or just good old-fashioned mashing.
Edit: Can't find it anywhere, it appears to be discontinued