Dual fuel thermostatic heating element for central heating-connected towel rail, allowing towels to be warmed/dried electrically in the summer or when central heating is off.
£30 price is for one element and a connecting t-piece. Brand new and unused, high quality item indicated by a manufacturer's 10 year warranty, although the warranty is unlikely to be transferrable. (Cost for £52 new)
I have another heating element without a t-piece and with a blanking plug missing so this one is at the cheaper price of £20 - these parts can be bought separately from plumbing or diy shops.
Buyer to collect from Broadstairs please. Also advertised elsewhere.