- 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 EUR 235.00 - See more - Buy online