Quality Park No. 10 Window Security Tinted Envelopes with a Self-Seal Closure

Single Window - #10 - 4 1/8" Width x 9 1/2" Length - 24 lb - Self-sealing - White - Wove - 500 / Box. Security-tinted with reflex blue pattern to make it impossible to see the details of the contents even when held up to light. Redi-Strip closure for a clean, quick seal immediately upon contact - simply peel off adhesive strip and press to seal.