Very cheap materials. The sofa is VERY low, so I have been trying to change the legs and asked Wayfair for supplier's number. The manufacturer (or the supplier) is a Chinese company where I cannot even reach out to ask about the size of the bolts (threads) of the sofa legs. That Chinese website does not have a number in the US - all in Shanghai. DO NOT BUY IF YOU WANT AT LEAST SOME WARRANTY.