These subseries come with Carbon Core Guard DWE-5600[3229] DWE-5600[3508] DWE-5600[3526] G-B001[3519] GA-010[5735] GA-2000[5590] GA-2100[5611] GA-2100[5711] GA-2200[5674] GA-B001[5690] GA-B2100[5689] GAE-2100[5611] GCW-B5000[3543] GD-010[3569] GG-B100[5594] GM-S2110[5730] GMA-P2100[5730] GMA-S2100[5611] GMA-S2100[5711] GMA-S2200[5694] GR-B200[5635] GR-B300[5719] GST-B200[5608] GST-B300[5631] GST-B400[5657] GST-B500[5684] GW-9500[3553] GWF-A1000[5623] GWG-2000[5678] GWG-B1000[5713] GWR-B1000[5588] MTG-B2000[5636] MTG-B3000[5672] G-Shocks with CarbonCoreGuard have a carbon fiber reinforced resin case, which protects the module.This technology adds shock resistance, rigidity, and resistance while at the same time reduces weight.