Watch Specifications: Case: White Resin Carbon X Case diameter: 40.5mm Glass: Sapphire crystal Movement: Cal.0S21 Miyota Chronograph Water resistance: 10atm / 100m / 328ft Chapter ring: Tachymeter Dial: Sandblast texture Seconds-Hand: 60-Seconds Chronograph Subdial Markers: 24H Timer and 60-Minute Chrono Timer Crown: Push-pull crown Buckle: Cerakote 316L stainless steel Strap: Nanotech dirt resists rubber two-tone - Yellow Red Strap Optional: Nanotech dirt resists rubber - White Strap length: 75mm x 120mm Case back: Screwed in, 316L stainless steel. Lug width: 17mm