For the installation of central plates from the Busch-Duro 2000 SI and Reflex SI series, such as sockets, potential equalization sockets, antenna sockets, and ISDN sockets. Delivery does not include a central plate. Comes with a sealing ring. IP44 rating only in conjunction with the Allwetter 44 frame. Compatible with central plates 1746-...-101, 1743-04-..., 1743/10-04-..., or data inserts with cover plates measuring 50 x 50 mm, such as those from Ackermann, Rutenbeck, BTR, Telegärtner. Can only be combined with covers featuring recessed installation devices. Dimensions: 66.7 x 10 mm.