... spring,no sag spring,belong to sofa parts Foam Flex 5009, OKE clip strip, zigzag spring, ... spring, coil spring,zig zag spring,sofa spring,seat spring,back spring belong to sofa part or ... sofa fittingspring(1) Foam Flex 5009 (used with Zigzag springs) 1).significantly ... 95m/rollOur Foam Flex inside the sofa are made especially for edge and good shape of upholstery. Foam Flex 5009