Material, Width316L stainless steel, 44 mm BezelFull LUM-TEC MDV Technology luminous diver bezel (unidirectional rotating) CasebackThreaded caseback with double sealing system Crystal5mm thick curved sapphire crystal CrownScrew lock crown with triple diamond sealing system Water Resistant500 Meters/1650 Feet MovementJapan Sii NH35 Automatic & Handwinding Mechanical Movement StrapCustom molded anti-static rubber strap. 24/22 size Lug Width24 mm