400 piece Self Seal Suffocation Warning Combo Pack 1.5 mil Poly Bags: 4 sizes. 100 each: 9x12, 11x14, 14x20 & 18x24 100 bags each: 9x12, 11x14, 14x20 & 18x24 Meets Amazon's FBA shipping supplies packaging requirements. Easy peel and seal closure. No impulse sealer needed. 1.5 mil clear poly bag. Suffocation warning in English, French and Spanish.