Material, Width316L stainless steel with a titanium carbide PVD hard coating, 43 mm CasebackThreaded sapphire caseback CrystalSapphire crystal with clear double side anti-reflective coating CrownScrew lock crown with double diamond sealing system Water Resistant200 Meters/660 Feet MovementMiyota Japan 9015 28,800 BPH automatic movement with handwinding and hack feature Strap2 heavy gauge NATO nylon straps (green and black; 22/22 size); Molded rubber strap Lug Width22mm