No. 10 Treated Security Envelope, 4-1/8 x 9-1/2, 24 lb Treated for Mold/Mildew, Redi-Strip Self-Seal, 500 EA/BX

No. 10 Treated Security Envelopes are made with a material that inhibits the growth of mold and mildew to protect your contents. Security tint with pattern makes it difficult to read the contents even when held up to light. Remove the easy-to-use, peelable paper strip and press for a permanent seal.