Grey 100% recycled board made from 100% post consumer waste. FSC certified. Suitable for backing photographs or brochures, great for mailing protection of documents to prevent bending or folding, also can be used for book binding, backing pads, calendar backs, gift boxes and other creative projects. Available in a range of sizes in packs of 25 sheets. 1100gsm = the sheet is approx 1.75mm thick.