Casio Style Watchband Fits Casio G-Shock G-100, G-2300, G-2310, and GW-2310 -Made by J.P. Leatherworks Black Polyurethane Rubber Fits Casio G-shock G-100, G-101, G-2300, G-2310, and GW-2310 16mm wide at attachment point. Waterproof and durable. Made by J.P. Leatherwork for The Watchband Store