Introducing our Premium American Made Low Profile Wood Box Spring. This Wood Box Spring is 4 inches height. Designed to be assembled in your bedroom (10-20 minute assembly). This allows our product to fit up tight staircases, hallways, elevators, etc. Perfect for town houses, condos and any other place a fully assembled Box Spring cannot fit. You will no longer need split Box Springs. Perfect for thick mattress's making it easier to get in an out of bed. Great Mattress Foundation for your heavy memory foam, latex or inner spring mattress. Satisfaction Guaranteed. Lifetime Warranty Included for Free!