I'm looking for very thin (1-2mm) and very narrow (10-12mm) strips of flat steel in 900mm lengths. If it's in a longer coil, then I can cut it. It can be plain, galvanised or stainless, as long as a magnet will stick to it. My preference is stainless. The purpose is to embed them in bookshelves, so that I can attach magnetic labels (its for a large charity bookshop). So the labels will be either letters of the alphabet or author names. I've looked online at steel mills/merchants, but this seems too thin/small for them. I've also tried googling it as 'trim', although most results have non-flat profiles. Any thoughts? Thanks! EDIT: It just occurred to me that I could cut up steel tape measures. Going to give that a try.