Ultransmit Glass Disk Transducer for Dimplex Opti-Myst Electric Wall Fire Premium quality compatible replacement glass disk transducer unit for Dimplex electric wall fire. Specifications: Ultransmit M-011B MFD 201312 DC24V 500mA or M011B-1C A3 4414 CHM4312. Pack contains: 1 x transducer unit - complete with 1 x glass disk (ready for use). Fits models: DIMPLEX RTOPCS20, RTOPW20, RTOPI20BR, RTOPI20CH, BBK20 (Series A-D), BBK20 (Series E), BRG20 (Series A), DNV20CH (Series A-Onward), DNV20AB (Series A-C), DNV20BL (Series A-Onwards), DNV20BR (Series A-C), MFD20 (Series A), OKT20 (Series A), RDY20 (Series A-D), RDY20 (Series E), SCR20 (Series A), SCR20 (Series K), TAH20 (Series A), TAH20 (Series E), WBK20 (Series A), WMR20 (Series A), ALM20 (Series A), AUB20 (Series A), CAS600, CAS400NHLL, CAS400HLL, CAS600NH, RTOPCS20, RTOPW20, RTOPI20BR, RTOPI20CH, SVT20 (Series A). Manufacturer names and numbers are used for reference purposes only. This part is not affiliated with the original equipment manufacturer. Spare discs and removal tool sold separately.