Perfect Fit replacement watch band for CASIO G-Shock:

GA-100 (5081)
GA-110 (5146)
GA-120 (5229)
GD-100 (3263)
GD-110 (3400)

Genuine Resin Band
Stainless Steel Buckle
Color: Glossy Black
Fits CASIO:
GA-100CS-7A
GA-110HC-1A
GA-110MC-1A
GA-110SLA-1A
GA-120B-1A
GD-100HC-1
GD-100SC-1
GD-110-1

Lug Width/Band Width: 16mm/mm
MPN: 10378391, 10389118