Surface-mounted housing 2-way S.1 polar white, matt - with cable and duct entry - entry possible at the top, bottom and in the middle of each side - for vertical and horizontal installation - suitable for installation on flammable surfaces - installation depth 37 mm With the surface-mounted housings, flush-mounted devices can be used for surface-mounted installation. For suitable pipe entries and replacements for cable and duct entries, see the surface-mounted range.