I am selling an antique doorbell. I am not sure of the metal. The bell part is non magnetic but the base part is magnetic. This thing is very very old. It had about an eighth inch of paint layers on it but I got it all off after soaking it in stripper. Unfortunately the base is missing a piece that either broke off or was ground off. Its a very uniform missing piece and is a little hard to tell from looking straight at it. The bell has 10/32 threads and would probably fit other base parts. This is a really nice historic example. Paypal is accepted.