The brush is supplied with Lakeland's OvenMate oven cleaning kit — it is not sold separately. One end is like a half-sized toothbrush; the other is like a stiff pastry brush. Overall length of brush is 7¼" or 18.5cm. See
http://lakelandcamel.scene7.com/is/image/LakelandCamel/4972_1?$380$
The oven cleaner is excellent as well, a Which? best buy, but remember to empty your pot and pan storage drawer first as it eats painted, non-stick and anodised surfaces, also aluminium and copper. Don't use it on self-cleaning ovens. It's also great for removing baked-on grease (and everything else) from Pyrex and other glass. It also claims to be biodegradeable, so kitchen towel used with it should be composted.
Mainland UK delivery only and from Lakeland's Belfast store — see
www.lakeland.co.ukBernard C.

ps — please add in details if you know of this product being sold in other countries.