C4 Manila Board backed envelopes come in boxes of 125 envelopes and are printed with a “Please Do Not Bend” message on the front for maximum security. This envelope is ideal for A4 sized documents, certificates, photos and flat items. A strong paper envelope with a 1000 micron rigid backing card ensures excellent protection against folding, bending and damage in transit and these carefully chosen materials also keep weight to a minimum reducing your costs. A wide flexible opening and secure peel and self-seal closure ensures that our board backed envelopes are fast and efficient to pack and flat packing in high quantity boxes helps you store a large volume of envelopes in minimal space. Order today and save with our accumulator saver box rates, free samples can also be ordered should you wish to try before you buy - if you need any help then please Contact Us