Colin's Watches are proud to be able to offer this very useful tool at a very low cost. This fibre glass brush has a retractable "business end" that keeps the device as clean as possible. 
The fibre glass brush is easily extended by twisting the top of the device.
Extremely hard wearing and, although dependant on how much you use it it was last a long, long time.
An essential tool for the watch / clock enthusiast.