Pirastro Rosin Goldflex 9006。售價 HK$115，有貨。Pirastro Rosin Goldflex 9006 mixed with gold dust for extra brightness in Violin and Erhu. Pirastro Rosin Goldflex is handmade in Germany, suits synthetic violin strings and Erhu strings. Pirastro Rosin Goldflex is a sl…