Casio Men's G-Shock Master of G Series Gravitymaster GR-B300EC-1AJFProduct Highlights Embrace the world of professionals taking on tough missions in rescue scenarios with the G SHOCK MASTER OF G Series. Featuring a black body symbolizing toughness adorned with vibrant emergency colors. Product Overview The G SHOCK MASTER OF G Series supports activities in harsh environments. The black body with striking emergency colors expresses the worldview of professionals facing challenging missions in rescue scenarios. Gender