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. Mailer/Envelope Size: 7.50"; Width x 10.50"; Length. Reinforced Clasp. Rust Resistant - Clasp. Color: Brown. Material: Kraft.