Jagwire's M7 Adjusting Barrel is a 7 x 1.0mm-threaded replacement cable-adjusting barrel. It's the right part for many older style mountain bike brake levers. It comes in two models and is made of durable metal with a lockring for locking your adjustments.
The beautifully resonant ring of solid brass with five different coloured bases. Sounds with a traditional double "Ding-Dong". Fits handlebars from 21.7 mm...