Double Window Envelopes. Double Window Envelopes are the perfect laser check companion. With security print lining on each envelope and a snug fit to ensure there is no obscuring an address during mailing. The top window can display company information or a custom logo and t... - Double Window Envelopes.
Double Window Envelope for all 3 up 1099s. Compatible with 3-up 1099 tax forms, security tint, regular gummed seal closure... - Double Window Envelope for all 3 up 1099s.