... spring,no sag spring,belong to sofa parts Foam Flex 5009, OKE clip strip, zigzag spring,no sag spring,sinuous spring ... belong to sofa part or sofa fittingspring(1) Foam Flex 5009 (used with Zigzag springs) 1).significantly time-saving 2).High ... edges 6).Technical date: 1>.5009-080, packing: 400m/roll 2>.5009-120, packing: 270m/roll 3>.5009-140, packing: 240m/roll 5 ...