New Guardian Armour C4 Envelopes Gusset Manilla (Pack of 100) A28113These New Guardian Armour gusset envelopes are made from durable, heavyweight 130gsm paper reinforced with woven polyester thread for additional strength. The manilla envelopes feature a simple peel and seal closure with Power Tac adhesion for an extra strong bond and expanding 50mm gusset for mailing bulky items. These C4 envelopes are suitable for A4 documents. This pack contains 100 manilla envelopes. C4 extra strong manilla gusset envelopes Pocket