Ultransmit Glass Disc Transducer for Dimplex Opti-Myst Electric Fireplaces. Premium quality compatible replacement glass disc 'Ultransmit' transducer unit for your Dimplex electric fireplace. Specifications: Ultransmit M-011B MFD 201312 DC24V 500mA or M011B-1C A3 4414 CHM4312. Package Includes: 1 x transducer unit - complete with 1 x glass disc (ready to use) Fits Models: DIMPLEXRTOPCS20, RTOPW20, RTOPI20BR, RTOPI20CHBBK20 (Series A - D) | BBK20 (Series E) | BRG20 (Series A ) | DNV20CH (Series A - Forward ) | DNV20AB (Series A - C) | DNV20BL (Series A - Forward) | 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) Manufacturers' names & numbers are used for reference purposes only. These parts are in no way associated with the initial manufacturers parts. Extra discs and removal tools must be purchased separately.