D'Addario Natural Rosin perfect for either horsehair or synthetic hair bows All natural ingredients combined in a very special process make D'Addario Natural Rosin perfect for either horsehair or synthetic hair bows. Handsome packaging fits nicely in cases and the unique plastic channel provides an easy grip for students. D'Addario Natural Rosin offers premium performance at a great value. Light and Dark rosin options available. Light or dark rosin All natural ingredients Plastic channel provides easy grip Suitable for horsehair or synthetic hair bows Designed and manufactured in the USA at our New York facility to the most stringent quality controls in the industry Brand D' Addario SKU 101410404_NP-1022204277 Model VR300