Bob Reeves Trumpet 43.5 /ES 692sL, Mouthpiece for Trumpet, Extra flat cup, Edge number 43, Semi-round edge with a soft edge, Comparable to Bach 1, 1 1/2 C, 2, 3B, 5C Elkhart and Schilke 15 and 16, Backbore: 692sL, Cup diameter: 17.26 mm (43.5 / 64""), Especially for high-note players, Similar to backbore 692s but more efficient, Silver-plated
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