Perfect Fit replacement watch band for CASIO Protrek:

PRG-260 (3173)
PRG-550 (5213)
PRW-3500 (3414)

Genuine Resin Band
Stainless Steel Buckle
Color: Black
Fits CASIO:
PRG-550
PRG-550-1
PRG-550-1A
PRG-550-1A9

Also Fits Casio Series:
PRG-200
PRG-250
PRG-260
PRG-500
PRG-510
PRG-550
PRW-2000
PRW-2500
PRW-2600
PRW-3500
PRW-3500Y
PRW-3510
PRW-3510Y
PRW-5000
PRW-5100

Lug Width/Band Width: 18mm/27mm

MPN: 10412704