"Universal Office Products 36321 Open-Side Business Envelope, 1 Window, #10, Square Flap, Gummed Closure, 4.13 x 9.5, White, 500/Box - Box of 500"
$30.44
"Business-weight, 24 lb stock gives this envelope a professional feel. Wove finish provides a crisp appearance. Fully gummed flap ensures a secure seal."