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We stock these high-quality Gusset Pocket Envelopes in the popular manilla C4 size which is a great everyday option for sending out documents and letters. The gusset in these economical envelopes offers extra capacity to accommodate thicker documents, and the self-seal strip provides a quick and easy strong seal. Available with great mix and match bulk deals on all products through our Accumulator Saver scheme and 1% back on all orders.