C4 White Board backed envelopes come in boxes of 125 envelopes and are ideal for protecting A4 sized documents, certificates, photos and flat items when posted. A strong plain white 120gsm paper envelope with a 1000 micron rigid backing card ensures excellent presentation and high levels of protection against folding, bending and damage in transit. Secure peel and self-seal closure and a wide, flexible opening make our board backed envelopes fast and efficient to pack and packing flat in high quantity boxes helps you them get to you in good condition and allows you to 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