Recessed magnetic contact. High security, EN50131 Grade 3 certificate. Opening distance 6 mm. It incorporates tamper with micro switch and protection against sabotage by magnetic field. Terminal with 4 terminals for connection, does not require connection box. Selectable final line resistors. It can be configured as double contact. It can be used in double leaf doors. Environmental class II. White color. Casing size: ø 20 x 32 x 33 mm.