No. 10 Economy Airmail Regular Envelopes w Inside Blue Security Tint , 4-1/8" x 9-1/2", White Sulphite w Red / Blue Border and "Par Avion" Imprints (SFI Certified) - Box of 500 Envelopes

No. 10 Economy Airmail Regular Envelopes w Inside Blue Wesco® Security Tint , 4-1/8" x 9-1/2" Red / Blue Airmail Border and "Par Avion" Imprints Front and Back White Sulphite 20-lb Paper with Vellum Finish Diagonal Seams, Split Remoistening Seal, Boxed with Flaps Down, 500 Envelopes Quality Mailing Products from Linton Mailing Supplies®