- Standard series - Outer diameter: 27.13 mm (1,068") - Inner diameter: 17.04 mm (0.671") - Cup shape: Medium C cup - Relative cup depth: 6 - Shape of the backbore: MO - Silver-plated - Comparable to Monette B2S3, ACB 1-1/4 or MV 1-1/4C EUR 153.00 - See more - Buy online