Luminox Women's 7051.BO Colormark Blackout Luminescent Watch Strap/Bracelet material: Rubber / Silicone / PU Swiss quartz movement, Carbon case, Mineral crystal Case diameter: 38.00 mm Case Bezel: Rotating 1-Way Diver Water resistance (m/ft/atm) 200 / 660 / 20, suitable for recreational scuba diving Swiss quartz movement Mineral crystal Case diameter: 38 mm Carbon case Water resistant to 660 feet (200 M): suitable for recreational scuba diving