- Standard series - Outer diameter: 27.08 mm (1,066") - Inner diameter: 16.97 mm (0.668") - Cup shape: Medium C cup - Relative cup depth: 6 - Shape of the backbore: S - Silver-plated - Comparable to Curry 1.5 C, Warburton 3MC, Bach 1.5 C, Monette B3 or GR67 EUR 153.00 - See more - Buy online