Extra Strong A2 Size Double Wall Artwork Mailer Stiffeners (310mm x 215mm)

Our C4 / A4 size artwork mailer stiffeners provide additional protection for your A4 size pieces of artwork that need to be transported through the courier networks or the postal system.

Although we are confident that our excellent quality A4 artwork mailers provide superb transit protection for A4 size artwork, these strengtheners are for people that want to add another layer of protection to their items.

Each stiffener weighs approximately 25g