Mainstays 5″ King White Jacquard Smart Box Spring.

Sets up easily in seconds

An innovative design allows the box spring to easily fold up for storage and transport when not in use

Provides ultra-sturdy support for any innerspring, memory foam, or combination mattress

Features a 100% polyester jacquard cover

Constructed with a durable powder coated steel frame for a long life of reliable use. Easy to assemble with no tools required. Available in Twin, Twin XL, Full, Queen, King, and California King sizes, Twin and Twin XL can support up to 600 lbs. total weight capacity. Full, Queen, King, and California King can support up to 1200 lbs. total weight capacity, Twin dimensions: 74″ x 38″ x 5″; 23.83 lbs.. Twin XL dimensions: 79″ x 38″ x 5″; 24.43 lbs. Full dimensions: 74″ x 53″ x 5″; 34 lbs. Queen dimensions: 79″ x 59.5″ x 5″; 37.4 lbs. King dimensions: 79″ x 75.5″ x 5″; 44.58 lbs. California King dimensions: 83″ x 71″ x 5″; 43.63 lbs. This item ships in one large box that may not fit into a standard-sized vehicle. Please make sure you have a large car or truck for store pickup. Twin shipping dimensions: 41.3″ x 11.2″ x 6.1″; 27.64 lbs. Twin XL shipping dimensions: 42.1″ x 10.8″ x 6.1″; 28.13 lbs. Full shipping dimensions: 56.3″ x 11.2″ x 6.1″; 38.8 lbs. Queen shipping dimensions: 62.4″ x 11.2″ x 6.1″; 42.6 lbs. King shipping dimensions: 78.5″ x 11.2″ x 6.1″; 50.42 lbs.. California King shipping dimensions: 74″ x 11.2″ x 6.1″; 48.6 lbs.