Merax 6 Inch Comfortable Sleep Built-in Pillow Top Inner Spring Mattress (King) KING6-inch Mattress uses high quality 468* 13.5 gauge tempered steel spring coils for long lasting support Mattress Core Construction: Innerspring Dimensions: 6.0 " H x 76 " W x 80" L Comfort Type:Firm Warranty Description: 25 Year Limited Manufacturer Warranty