These night drop envelopes are made of heavy duty 24# white wove stock. These envelopes are the perfect size...large enough to hold keys with remote and compact enough to fit through doors and not overload your box. 6” x 9” 24# White wove, open end Prints in Blue ink Opens at top 1 color imprint on quantities of 500 and up Standard ink colors: Red, Blue, Black, Green Packaged 500 per box in stock