Business Source Self-Seal 6"x9" Catalog Envelopes - Catalog - 6" Width x 9" Length - 28 lb - Self-sealing - Wove - 100 / Box - White - Catalog envelopes feature an adhesive strip protected by a removable paper liner. Simply remove the liner and press the flap closed for a quick, clean seal upon contact without moistening. Paper liner keeps adhesive free of dust. Envelopes are made of white wove material. 28 lb.