Quality Park #8 Double Window Security Check Envelope, Gummed, White, 3.625 x 8.625, 500 per Box, (24526) DURABLE: Made from 24 lb. white wove stock GUMMED: Fully gummed flaps provide a secure seal to keep contents secured SECURE: Protect sensitive client information with these security tinted envelopes. The reflect blue tint pattern makes it impossible to see the details of the contents, even when held up to the light GREAT VALUE: Conveniently packed in 500 count to reduce the frequency of repurchasing FEATURES: 500 White #8 Double Window Security Check Envelopes