Diameter of the case 48mm made from high grade 316L steel Movement 6S20 (chrono) from Miyota Steel case with PVD dark titanium coating Bezel with Diver ring Titanium colored dial Reinforced mineral crystal Screwed crown & pushers 20 ATM water resistant Black silicon strap with anti-dust protection layer & PVD dark titanium coated clasp All straps have a special case/strap connection, so that the strap fits perfectly around the wrist