Pack of 10 Brown Recycled Board Back Envelopes. Manufactured from strong durable 115gsm manilla and 550gsm board made from 100% recycled from post-consumer waste. Designed to ensure safe transport of photographs, transparencies and the like, these will not tear, fold or crease. These envelopes are printed with the text "Please do not bend" and have a peel seal closure. Size: C4 324mmx229mm (12.75x9).