UIM1550 Features: * Expansion envelope * Tyvek material * Excellent alternative to boxes and cartons * Contains convenient, secure and no moisture required grip seal flap * Simply peel off release strip and press down for a quick and secure seal * Made of heavy duty * Ideal for mailing bulky items and materials * Superior protection and resistance against water, chemicals, moisture, bursting, tearing and puncturing * Weight capacity: 18 lb * Made in USA Color/Finish: * Color: White Dimensions: * Overall dimensions: 5.5" H x 11.5" W x 15.7" D