Amy Birch ‘AB’ Dark Cello Rosin – handcrafted in England using the original early 20th-century recipe. This medium-hard rosin delivers a warm, balanced tone with smooth traction on cello strings, making it ideal for beginners through early conservatoire players. Wrapped in a soft cloth with a ribbon tie, it combines traditional aesthetics with convenient storage. With a Grip Profile Rating of 5 (GPR#5), AB Cello Rosin performs beautifully in temperate to warm climates.