Casio Men's G-SHOCK MT-G Series MTG-B3000D-1A9JFProduct Highlights The MTG B3000 features an evolution of the "Dual Core Guard Structure," which protects the module with a carbon reinforced resin case and covers the exterior with metal parts. The stainless steel back cover is intricately shaped through multiple processes such as pressing, cutting, and polishing to achieve a three dimensional complex form. By integrating functions like lug fixation, guard structures, and button guards into the back