Ultransmit' Glass Disk Transducer for Dimplex Opti -Myst Electric Wall FirePremium quality compatible replacement glass disk 'Ultransmit' transducer unit for your 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:DIMPLEXRTOPCS20, RTOPW20, RTOPI20BR, RTOPI20CHBBK20 (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)Manufacturers' names & amp ; numbers are used for reference purposes only. These parts are in no way associated with the initial manufacturers parts. Spare discs and removal tool must be bought separately. qiong