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                    The Sigma features a unique concave bore leadpipe. This allows 
                    good resistance in the upper register whilst not sacrificing 
                    the lower register This 
                    is a versatile trumpet with an emphasis on lead playing ML 
                    .461" (11.75mm) bore     4.88" (124mm) 
                    bell  Bell 
                    model Sigma taper for focus and projection Nickel-silver 
                    leadpipe              
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