Kanstul ZKT 1504 Bb-trumpet, Signature Series, Ø 11,65mm bore size (.460"), Ø 123,5mm bell diameter (4-7/8"), length 19 1/8", weight 2-1/2 lbs, #72 Bell, #43 mouthpipe, 2 amado water keys, metal valve guides, hand-fitted monel pistons, ring on the 1st valve slide & 3rd valve with slide stop screws, clear lacquered, without case and mouthpiece