... per ur demands 4.Certification:ISO9001 5.OEM is availabl Pocket Coil Spring Product Information: size as requested featureheat treatmentwire gauge1.0mm ... springheight6cm to 30cm for pocket spring , 8 cm to 21cm for bonnell spring ,outside diameter3.5cm to 7.5cm for pocket spring , 7cm to 9cm ... to establish business relations with your esteemed company ! High Quality Pocket Spring Unit