Note: The word "B" is behind GST, which is not available with Bluetooth!
Replacement Casio G-SHOCK strap GST series resin strap
Strap interface type: female interface
Strap length: 13.4 + 8.2cm
For GST series models:
GST-W300G, GST-W300, GST-S300G
GST-S300, GST-S210B, GST-S100G
GST-S110, GST-W100G, GST-W110