These Top Flight #10 security envelopes are perfect for both personal and business correspondence. Each box contains 500 envelopes measuring 4 1/8" x 9 1/2", made with heavyweight 24-pound white paper for durability and professional appearance.

The envelopes feature security tinting on the interior to prevent contents from being viewed from the outside, protecting sensitive documents and personal information. The convenient strip and seal closure eliminates the need to lick the envelope - simply remove the protective strip covering the adhesive and press down to create a secure seal. Double side seam construction ensures reliable closure and prevents contents from slipping out.

Made in the USA with high-quality paper stock, these envelopes are suitable for everyday mailings, bill payments, business communications, and any correspondence requiring added privacy protection. The self-adhesive closure provides a clean, professional appearance while saving time during high-volume mailing tasks.