Rosin is used on the hair of the bow to obtain a level of grip on the strings in order to make them vibrate and produce a note and is an essential accessory for the string player. Most rosins come as a small manageable block that can be stored in the instrument case and available when necessary.
Here at Yamaha Music London we sell a range of violin, viola, cello and double bass rosins from well-known manufacturers, such as Pirastro and Hidersine.