CAVIUS flush-mounted mounting base, 40 mm With the flush-mounted mounting base, the CAVIUS Invisible smoke detector can be largely recessed into the ceiling. The smoke detector with VdS certificate and integrated 10-year battery then only protrudes a full 20 mm below the ceiling. Suitable for the following CAVIUS Invisible models with Ø 40 mm and central test button * Smoke detector 2007 * heat detector 3003 * CO alarm 4002 For recessed mounting in hollow ceilings or walls. https://elecena.pl/product/18367659/1479090-flush-mounted-mounting-base-40-mm 2021-05-06 https://elecena.pl/product/18367659/1479090-flush-mounted-mounting-base-40-mm 2023-06-06