Zodiac Men's 'Super Seawolf 68 Extreme' Swiss Automatic Stainless Steel and Rubber Casual Watch, Color:Black (Model: ZO9501) Case thickness: 16.5mm; case diameter: 45mm; band width: 20mm; strap circumference: 200 +/-5mm Strap material: rubber; movement: automatic; water resistance: 100 atm Swiss-automatic Movement Case Diameter: 45mm Water resistant 200m (660ft):in general, suitable for professional marine activity and serious surface water sports, but not diving