100 - 11x13.5 RIGID PHOTO MAILERS ENVELOPES FLATS BY VALUEMAILERS Protect important items with these rigid and durable cardboard mailers. 26 point paperboard for a clean white appearance. Perforated tab and tear system that saves you time in retrieving your item Reduces shipping costs by eliminating carton filler & reducing labor. Multi-functional, expands to accept varying contents & weights.