400 Bulk Pack Size #6 12.5x19 Self Sealing Poly Envelopes Max Protection for Large Items

Usable Size (Internal): 12.5 x 18 inch — Exterior: 12.5 x 19 inch. Uncompromised Final Seal: The superior permanent adhesive maintains its sealing integrity in all climates, ensuring the product's security every step of the way. Absolute Lowest Unit Price: The 400-pack volume provides the best return on investment for sourcing large, protected mailers in bulk. Commercial Grade Durability: Built with heavy-duty, co-extruded poly suitable for large-scale, commercial mailing, ensuring consistent quality and structural integrity.