Genuine Casio replacement resin band in black. 
 
 
 
Made for the following model(s): 
 
G-100-1BV
G-100-9BV
G-100-9C
G-101-1AV
G-200-1EV
G-2110-1V
G-2300-1V
G-2300-9V
G-2300F-4
G-2310-1
G-2310BC-1
G-2310R-1
G-2400-1V
GW-2300F-4
GW-2300FP-4
GW-2310-1
GW-2310FB-1
GW-2310FB-1B
GW-2310FB-1B4
GW-2320SF-1B4