Serta 822119-920 Serta Motion Essentials II Adjustable Foundation, Twin XL, White High performance lifting capacity of up to 650 pounds for each base; including the mattress; see product manual for more details Smooth power lifting system features head and foot motors that gradually increase in power when articulated Simple four-button wired remote allows you to raise and lower the head and foot of the mattress Zero clearance design allows the foundation to easily fit into platform frames (with or without legs) and sleigh beds Must order two TXL bases for one king set; one TXL size dimensions: 37.5" X 80" x 9.25"