Inner Diameter : 38.5mm Outer Diameter : 34 mm Material: Aluminum Alloy for Omega Speedmaster Watch Case Sold quantities for 1, 3, 5, 10 pieces/Pack as you choice from the listing options Note : 1, please allow 0.01-0.1 mm error due to manual measurement. 2. The color may be slightly different due to different display methods. Please understand.
