... with competitive price 3. Professional service with No MOQ!!!!!!! Folding sofa bed frame, metal sofa bed mechanism, three fold sofa bed mechanism 1. A ... the attachment to avoid the damage of the metal layer mattress.8. Tubular frame, safe, smooth, beautiful ride comfort.Shun ... 4)1.5mPS:The sofa bed frame can be produced upon request . Folding sofa bed frame, metal sofa bed mechanism, three fold sofa ...