Envelope-T4 1 Window, 5-3/4X9 Security, 500/Box

Supremex single window T4 envelopes, open side with gummed flap, artlined for security. Single Window Size: 1-15/16" x 4-1/4". Single Window Placement: 5/8" left, 1-1/4" bottom. FSC® certified. Made in Canada.