Description: Case material: 316L stainless steel Case color: silver Case diameter: 38mm Solid bottom cover watch case Thickness: 12.80mm (Total thickness from sapphire glass to bottom cover) Transparent back cover watch case Thickness: 12.30mm (Total thickness from sapphire glass to bottom cover) Adapted dial: 28.50mm Bezel size: outer diameter 36.60mm - inner diameter 30.70 Bezel material: Aluminum bezel Crown type: screw in type Glass material: sapphire crystal glass Suitable for strap width: 20mm Watch strap material: 316L stainless steel Waterproof depth: 100 meters Adapted movement: NH34 NH35 NH36 NH38 4R36 movement Back of Case: (Available in transparent glass case back and solid stainless steel case back for you to choose from)