New Guardian C4 Envelopes Gusset 130gsm Manilla (Pack of 100) E27266Ideal for mailing bulky items such as catalogues, reports, brochures and more, these New Guardian envelopes feature an expanding 25mm gusset and durable, heavyweight 130gsm paper. The manilla envelopes feature a simple peel and seal closure with Power Tac adhesion for a quick, strong seal. Suitable for A4 documents, this pack contains 100 C4 envelopes. Plain pocket envelopes with 25mm gusset Heavyweight 130gsm paper Strong Power Tac peel and seal