Business Source Economical No. 10 Window Envelope - Single Window - #10 - 9 1/2" Width x 4 1/8" Length - 24 lb - 500 / Box - White | Bundle of 5

Front window allows use with printed address to prevent reading errors Gummed flap creates secure closure to prevent peeling during transit 24 lb. stock produces high-quality look and feel Perfect for businesses, schools, personal use and more