Product details:

Durable Base Rest your mattress on a durable base with this Serta Perfect Sleeper California king box spring. The Serta StabL-Base Foundation is constructed from durable tempered steel and furniture-grade lumber for consistent support. Designed to increase the longevity of your Serta mattress, this box spring foundation is a snooze-worthy essential. Two box springs are required for a California king mattress size.