... spring,sofa spring,no sag spring,belong to sofa parts Foam Flex 5009, OKE clip strip, zigzag ... seat spring,back spring belong to sofa part or sofa fittingspring(1) Foam Flex 5009 (used with Zigzag ... springs) 1).significantly time-saving 2).High resistance to deformation 3 ... roll 8>.5009-220, packing: 95m/rollOur Foam Flex inside the sofa are made especially for edge ...