Plastic ABS magnetic contact for surface mounting. Provided with 2 metres of 4 wire cable. NC alarm and tamper contacts. Maximum operational opening 12 mm on iron doors y 17 mm for the rest. IP67. Magnet Dimensions: 8 x 8 x 40 mm, contact: 54 x 13 x 12.5 mm. Temperature: -25°C a +70°C. Security grade 3 certified.