Columbian Tyvek Catalog Envelopes, First Class, 9x12, White, 50/Box

This lightweight envelope sports a First Class green diamond border. Tyvek® envelopes resist punctures and tears. Features Grip-Seal® closure so you can be confident your contents stay inside. Envelope Size: 9 x 12; Envelope/Mailer Type: Catalog; Closure: Grip-Seal® Self-Adhesive; Trade Size: N/A.