Casio Black Resin Replacement Watch strap GST-B100-1, GST-B100
Genuine Casio Black Resin Watch Strap for Casio G-Shock:
GST-B100-1
GST-B100
GST-B100-1A
GST-B100-1AER
This resin strap also fits the following watch models:
GST-B100D
GST-B100D-1
GST-B100D-2
to replace the metal strap