Features: 1) 2, 3-track read/write heads used for: a) Motorized magnetic card readers/writers b) Automatic fare c) Toll collection d) Airline ticketing and boarding (ATB) applications2) 2M-2RWXXXX (2-track read/write heads) outline dimensions: 14.0 x 12.4 x14.8mm (L x W x H) 3) 2M-3RWXXXX (3-track read/write heads) outline dimensions:13.5 x 14.0 x 13.8mm (L x W x H)4) Main parameters include inductance, DC resistance, gap width and more, adjustable in accordance with clients' requirements5) LoCo (low coercivity 300Oe), HiCo (high coercivity 400Oe) and long-lifetime technology support.