do not bend envelopes


c3 mailers
C3 Mailers C3 mailers are from the cardboard member of the packaging family, not the plastic type or bags like our polymailers. The stiff heavier duty cardboard construction forms a rigid frame around the envelope, therefore offering a solid layer of protection for small, flat products.  Also because they’re made of […]

C3 Mailers and Beyond at Callancote