... in manufacturing comprssed pocket spring, sofa spring cushion ,pocket coil for sofa, sofa cushion spring, pocket spring, pocket cushion, sofa spring, seat spring, zigzag spring etc.sofa spring, pocket spring,coil spring1).Diameter: 1 ... treatment and anti-rust treatment8) Reasonable price9 )application: use for sofa cushion or chair10)quantity: up to customer request sofa spring cushion