This is the classic Sögreni bell. It comes with fittings, and is very easily mounted. Most people will mount it on the handlebar. The bell is made to fit all normal handlebars - most of them beeing 22,2 mm.
The different bells do not differ much in regards to tone, but some people say the brass bell has the clearest sound. The bell comes in a nice wooden box with the Sögreni logo printed on it - perfect if you buy the bell as a gift for someone. From left to right on the big picture: Brass, Steel, Copper, Zinc.