Swascana 1 Ton Duty Cheap Easy Carry and Assemble Light Weight Convenient Steel Box Spring for Rental Units/College/House/Guest (Twin Extra Long) Easy Through Doors, Corridors, Hallways and Stairs Light and Sturdy, Maximum Load 2 Tons Washable Cover, Bugs Free, Anti-Rotten More Durable than Traditional Box Springs Ventilate creates a Clean and Comfortable Sleep