No. 10 Neopost Machine Insertable Window Envelopes with Blue Wesco® Inside Security Tint, 4-1/8" x 9-1/2", White 24-lb Paper w Vellum Finish (SFI Certified) - Box of 500 Envelopes

No. 10 Neopost Machine Insertable Window Envelopes with Blue Wesco® Inside Security Tint Poly C Window: 1-1/8" x 4-1/2", 7/8" Left, 1/2" Bottom Diagonal Seams, Remoistening Seal, Boxed with Flaps Down, 500 Envelopes White Paper with Blue Wesco® Inside Security Tint (SFI Certified), 92% Brightness, Vellum Finish Quality Mailing Products from Linton Mailing Supplies®