Economical, dual-purpose envelope provides mailing or internal use versatility. Durable kraft construction delivers rip- and puncture-resistance. Two prong metal clasp and reinforced eyelet stands up to regular use. Extra wide, heavily gummed flap produces a strong seal. Envelope Size: 10 x 13; Envelope/Mailer Type: N/A; Closure: Clasp/Gummed Flap; Trade Size: #97.