The 1838TN from Interlogix is a magnet, 1038T series, white. The 1838TN contact is designed for window and door applications where surface mounting is preferred. Because of its sleek design, the 1038 contact is fast and easy to install. The switch and magnet are incorporated into the housing, and the terminal blocks are angled for easy access. In the unlikely event that the switch needs replacing, just push the housing down and slide it off. This reduces replacement time and eliminates any damage to the mounting surface.