Yellow border Hazardous Waste envelope measures 5 1/2 x 10 and is made of 2-mil poly material that protects and secure documents sold as 1000 per case. Yellow border Hazardous Waste envelope measures 5 1/2 x 10 and has adhesive backing that sticks securely to the shipments. Envelope offers excellent resistance to oil and water sold as 1000 per case. • 5-1/2 x 10 . • Yellow border Hazardous Waste . • Pressure sensitive packing list envelopes attach to the outside of your shipment. • 2 mil poly protects and secures documents. • Sold as 1000/Carton.