brand new and high quality. Strong adhesion: rub evenly once bow hair continued to for play more than double the average length of rosin. Sensitivity: can make the instrument sensitive in playing, pure and moving sound, reduce the noise. Less dust: Fewer powder fly during performance, so that players avoid inhalation of dust, reduce the harm to human for health. Application: Erhu / violin / cello and other stringed instruments (Universal Rosin) The new purchase of rosin may not be easy to wipe when used for the first for time, take hard objects, similar to the for key can be a few strokes, to the bow wipe will save for time, wipe Color:white for shell, yellow rosin Material:plastic for shell, resin rosin Size:(L) 4.5cm/1.77"(for W) 2.9cm/1.14"(H) 1.6cm/0.63" Quantity:1pc Note:Please allow1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1pcViolin Rosin