Every manufacturer has a different seat for its faucets, and they also often have different ones for their own various faucets. Without a name and/or a sample, you will not be able to get the correct one. And only the correct one will work. Anything else will cause the faucet body to fail and require changing the entire faucet.: I am having trouble putting a seat in a faucet. I do not know what brand of faucet it is, but I think : that it is one that people buy when renovating older homes.