Link Springs provide firm even support for daybeds. With the link spring there is no need for box springs and bed rails. Simply attach the link spring onto the daybed frame and add a standard twin size mattress. The link spring provides added storage underneath your daybed and lets you hide an optional pop-up trundle, perfect for sleepovers and extra guests. This 39” top spring is available in link wire with two or four cross supports or polypropylene deck and features universal brackets which adjust to fit all daybeds. Made of sturdy construction consisting of 1-1/2” x 1 ½” angle steel and Corner Braces with Angle up side rails designed to hold mattress in place while the recessed end rails accommodate longer mattresses.