400 Pcs Bulk 8.5x12 Inch Poly Padded Envelopes #2 Max Security Shipping Bags

Usable Size (Internal): 8.5 x 11 inch — Exterior: 8.5 x 12 inch. Instant Security Lock Mechanism: The strong peel-and-seal strip locks down immediately upon contact, creating a dependable barrier against accidental opening or pilferage. Economical for E-commerce: Bulk buying at 400 pieces secures a competitive low unit cost, directly improving the profitability of mid-sized e-commerce shipments. Flexible yet Durable Material: The resilient Polyethylene material resists cracking and maintains integrity, adapting slightly to contents while providing robust external defense.