- Standard series - Outer diameter: 27.18 mm (1.07") - Inner diameter: 17.07 mm (0.672") - Cup shape: Medium deep C - Relative cup depth: 7 - Shape of the backbore: MO - Silver-plated - Comparable to Bach 1-1/4C, Tilz 1-1/4CE or Monette B2 EUR 137.00 - See more - Buy online