For the installation of central plates from the Busch-Duro 2000® SI and Reflex SI series, such as socket outlets, potential equalization, antenna, and ISDN sockets. Delivery does not include a central plate. Comes with a sealing ring and 2 keys. IP44 rating only in combination with the Allwetter 44® frame. Compatible with central plates 1746-...-101, 1743-04-..., 1743/10-04-..., or data inserts with cover plates of 50 x 50 mm, such as those from Ackermann, Rutenbeck, BTR, Telegärtner. Can only be combined with covers that have recessed installation devices. Allwetter 44® (IP44).