Bastrombons MIRAPHONE Bb-691, open wrap (kvartas, tercas ventiļi)

– Bell diameter 250 mm (9,843 inch)
– Type of valve CPU linkage
– Bore of inner slide 14,3 mm (0,563 inch)
– Material of inner slide nickel silver-hard chrome
– Material of mouthpipe nickel silver
– Mouthpiece PO15
– lacquered