Product DetailsSku: ES5151Case Size: 37MMMovement: MultifunctionPlatform: STELLAStrap Material: Castor OilWater Resistance: 5 ATMCase Material: Castor OilCase Color: WhiteDial Color: WhiteStrap Fashion Color: WhiteInterchangeable Compatibility: 18MMStrap Width: 18MMClosure: 2 Pusher Foldover ClaspStrap Inner Circumference: 175 /- 5MMCrystal Type: MineralBattery Type: SR621SW