The hybrid mechanism: A mix of equally sofa mechanisms, this involves pulling, folding, or sliding a frame out to convert the sofa into a mattress. One example is, the bottom from the Article Nordby Pep Sofa Bed slides out and even more cushions elevate to create the sofa bed floor. https://cashxexjt.blognody.com/31495854/the-ultimate-guide-to-queen-beds-frames-for-sale