Why do you need to change it? Dont the kits alredy come with it? Is it beffier? Made Stronger for E-bikes?
It's not necessary to change the sprocket on your e-bike, but if your unit does not have a 7-speed sprocket on it already, you could change it out for this one to get that 7-speed functionality.
Some kits may come with one included, but we are unable to speak on that as we do not carry e-bike kits any longer unfortunately.
As for the durability of this sprocket, it is manufactured by Shimano, which is the best known name in in the world for bicycle gear cassettes due to their high quality.