HIGH QUALITY & BULK PRICING – 24lbs high quality envelopes at a fraction of the priceNO NEED TO LICK THE FLAP ANYMORE – Very convenientSELF SEAL ENVELOPE- Just peel and stick 4 1/8 in. x 9 1/2 in size envelopCAN’T SEE THROUGH ENVELOPES – Security printing pattern on the inside prevents from seeing what inside. Windowless envelopeLONG LASTING SUPPLY – 500 count per boxNDAA Section 889 Compliance Certfication