Business Source Heavy-duty Clasp Envelopes, #55, 6" x 9", 28lb, Kraft, 100/Box.
Heavy-duty clasp envelopes feature an open-end style, reinforced clasps, and deep gumming on flaps for a secure seal. Metal clasp with rounded edges is plated for rust-resistance. Large flap and superior gumming secure documents inside. 28 lb.