Check the listing for details. Cecilia Signature Formula Cello Rosin with Spreader. Condition: New. Listed at 47.00 USD. Strong Articulation for Expressive Playability Crafted using a proprietary liquid-form blending method, Cecilia Signature Formula rosin is tailor-made for demanding players with a wide range of repertoire. This medium-hard rosin’s clearly defined reaction ensures rich, expressive playability, along with powerful projection and a unique bowing sensation you won’t find anywhere else. The result is a warm, full sound with a less pronounced bite than harder variants. Ideal for most climates, Signature Formula rosin comes with a spreader, certifying a well-settled, evenly distributed application while also removing excess residue from your bow’s hair. Here at Sweetwater, we’re impressed by this rosin’s flexible sonic character as well as by its next-level bowing properties.