Tru-Tension Cycle Muck Monkey Chain Brush FACTOR SHIMANO's SM-JC41 Junction B is

SHIMANO's SM-JC41 Junction B is the central connector for DI2 systems

Material: Aluminum anodized

but also for the punishing environment of XC racing and endurance riding

Additional equipment needed:

Tru-Tension Cycle Muck Monkey Chain Brush FACTOR SHIMANO's SM-JC41 Junction B isThe Tru Tension Muck Monkey is the essential cleaning brush dedicated to keeping your chain looking its best, and in prime working condition. With four brushed faces you can work dirt loose on every surface of your chain, even in those hard to reach places. The Muck Monkey is designed for regular use with a mixture of short and long durable bristles to remove even the toughest dirt. Features Easy to UseProlong Sprocket LifeIncrease Chain LifeOptimise