Quality Park No. 10 Single Window Security Tinted Business Envelopes

Single Window - #10 - 4 1/8" Width x 9 1/2" Length - 24 lb - Gummed - White - Wove - 500 / Box. Blue tint pattern makes it impossible to see the details of the contents even when held up to light. Moisture-activated, gummed flap for a secure seal.