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 130gsm 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.