Quality Park Dupont Tyvek Grip-Seal Expansion Envelopes, Open Side, 18 Lb, First Class, 10in x 13in x 1 1/2in, Self-Adhesive, White, Box Of 100 MPN:R4210

Quality Park Dupont Tyvek Grip-Seal Expansion Envelopes offer enhanced protection for all your mail and documents, with a strong gripping seal that holds securely to the original contents. The open side design allows easy access and safe storage while the first-class size ensures prompt delivery. Ideal for businesses, schools, or any office setting, these white envelopes feature self-adhesive closure and a tamper-evident burst-proof seal to keep sensitive information confidential. With a capacity of 10in x 13in x 1 1/2in, it meets US Postal Service requirements for first class mailing standards, making them an excellent choice in the Office Supplies industry for secure mail delivery.