Paulus Frog ferrule for cello, … Paulus Frog ferrule for viola, nickel silver 14x6,2x10 mm Item No. B82100 Manufacturer Paulus bowparts Paulus Frog ferrule for violin … Paulus Frog ferrule for viola, nickel silver 14x6,2x10 mm × Paulus Frog ferrule for viola, nickel silver 14x6,2x10 mm