Double-Window Invoices Security Envelp.

Designed for laser invoices. Gummed. Eliminates the extra step of addressing. Double window security envelopes allow address on check to show through. Patterned interior conceals contents to preserve confidentiality. Return window size: 1-3/16x3-1/2"; address window size: 1x4"". Overall size: 3-7/8x8-7/8". 500 envelopes per box.