M2Z Watches combines characteristics of a diver watch with exclusive design and colors, made of a Monoblck SS Case. Automatic Diver watch with 20 ATM Water resistance Case Material: One-piece 316L Stainless Steel Glass: Sapphire Plating: Grade A IP GUN (0.6 mic tic +20%, pvd) Strap: Hypoallergenic polymer - FKM Water resistant: 20 ATM Crown: Screw-down crown with double gasket and removable crown protector Movement: Seiko NH35 3HD automatic movement with 41-hour power reserve Bezel: Unidirectional anti-clockwise rotating bezel, with silicone insert