With labelling field. Labelling field 66.7 x 10 mm. For holding central plates from the Busch-Duro 2000® SI and Reflex SI range, e.g. sockets, potential equalisation, antenna and ISDN sockets etc. Supplied without central plate. With sealing ring and 2 keys. IP 44 only in conjunction with Allwetter 44® frame. Can be combined with central plate 1746-...-101, 1743-04-..., 1743/10-04-... or data inserts with cover plates 50 x 50 mm, e.g. Ackermann, Rutenbeck, BTR, Telegärtner. Can only be combined with covers with recessed built-in devices.