Universal Kraft Clasp Envelope, Center Seam, 28lb, 9 x 12, Brown Kraft, 100/Box – UNV35264. Durable heavyweight Kraft stock resists rips and tears. Reinforced eyelet and two prong clasp stands up to regular use. Gummed flap delivers a secure seal. Envelope/Mailer Type: Catalog/Booklet; Envelope Size: 9 x 12; Closure: Clasp/Gummed; Trade Size: #90.