Blake Purely Packaging 394 x 318 mm Board Back Pocket Peel & Seal Envelopes (15935) Manilla - Pack of 125Blake Purely Packaging Seal Envelopes Choose from a wide selection of packaging solutions to offer your mailings maximum protection and a secure delivery. Our range includes standard, everyday use products such as: Cushioned Padded Envelopes, One Touch Cardboard Boxes, Postal Tubes and Book Wraps. Along with more unusual, creative solutions such as our Metallic Bubble Envelopes, Cash Transit Bags and Polythene mailing security bags. Make a difference