CASIO 10390035 Resin Watch Band f/ PROTREK PRG250-1 PRG510-1 PRW2500-1 PRW5100-1 Casio genuine factory replacement band Fits: PRG-250, PRG-510, PRW-2500, PRW-5100 Lug Width/Band Width: This band fits Casio models listed in "Additional Information" below Casio