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 NON-STOCKING ITEM