... sofa spring,no sag spring,belong to sofa parts Foam Flex 5009, OKE clip strip, zigzag spring, ... belong to sofa part or sofa fittingspring(1) Foam Flex 5009 (used with Zigzag springs) 1).significantly ... for sub-uphosltery 5).Advantage: to creat edges 6).Technical date: 1>.5009-080, packing: 400m/roll 2 ... 125m/roll 8>.5009-220, packing: 95m/rollOur Foam Flex inside the sofa are made especially for edge ...