... ; OEM from China; Certification:ISO14001 ISO9001 SGS Specifications Small compression spring Process Capablilities Standard ISO, GB, DIN, JIS, ANSI ... steel, silicon bronze,etc.Head/Tread styles According client's requiresCoating/Surface treatment Zinc,Tin,Sn/Pb,Nickel ... SGS, ISO9001:2008, ISO14001:2004Carton size 30X20X20cm or according client’s requires About us: Xiamen Haixingcheng Metal Products Co ...