New Guardian Manilla Gusset Envelopes. Send bulky items with confidence in these high quality manilla gusset envelopes which provide a combination of good looks and strength. Exceptionally strong 130g/m² ribbed manilla paper across the whole range. Subtle ribbed texture and distinctive sheen provides an attractive finish 25mm 'block bottom' style gusset maximises available capacity. Five sizes + window in C4 ensure most sizes of content are catered for. All feature Peel and Seal adhesive for an exceptionally strong seal. Size: 350x248x25mm. Packed 100.