- Standard series - Outer diameter: 26.90 mm (1.059") - Inner diameter: 16.26 mm (0.64") - Cup shape: Shallow cup - Relative cup depth: 4.5 - Shape of the backbore: MT - Silver-plated - Comparable to Bach 7E, GR 64S or Giardinelli 7S EUR 153.00 - See more - Buy online