I got a jar of these pickled peppers from a friend, but neither of us knows what are these. They are home grown, less than one inch and quite hot, at least 50k SHU. Anyone knows what they are?

I got a jar of these pickled peppers from a friend, but neither of us knows what are these. They are home grown, less than one inch and quite hot, at least 50k SHU. Anyone knows what they are?