G-Shock GravityMaster Solar Watch Black The skys the limit! Introducing the GRAVITYMASTER GRB300, a piece of aviation-inspired professional gear designed to work even in the harshest environments, from the G-SHOCK MASTER of G line. The GRB300 features a Carbon Core Guard structure, which delivers the shock-resistance, rigidity, and corrosion-resistance of carbon material used in aircraft fuselages. The carbon fiber-reinforced resin case and the seamless bezel design inspired by next-generation aircraft come together in a bold and powerful form. Brand G-Shock Category Watches Model GravityMaster Hand Ambidextrous Proofs Water Resistant Power Source Solar Band Color Black Band Material Bio-based Resin Case Size 59 × 54.7 × 15.7 mm Case Material Carbon / Bio-based Resin Shock Resistant Yes Lens Type Mineral Glass Weight 71g