Quality Park No. 10 Double Window Security Tint Business Envelopes with Self-Seal Closure

Security - #10 - 4 1/8" Width x 9 1/2" Length - 24 lb - Gummed - White - Wove - 500 / Box. Double-window design positioned to the left to display sender and receiver addresses for invoices and billing statements. Protects sensitive client information with reflex blue pattern that obscures details of the contents even when held up to light.