This is an optional accessory for Z41 and TMD family, which allows to flush-mount these products in Dry-Wall. Policarbonate frame of the product should be removed according with instructions. Not compatible with aluminium, chromed or golden frame. The internal temperature probe should not be used, since a right measurement when flush-mounted cannot be guaranteed. Accessory of the references (ONLY Policarbonate frame): ZVI-Z41PRO, ZVI-Z41LIT, ZVI-TMDD, ZVI-TMDV, ZVI-TMDP4, ZVI-TMDP6, ZVI-TMDP8.