... from China; Certification:ISO14001 ISO9001 SGS Specifications Small compression spring Process Capablilities Standard ISO, GB, DIN, JIS, ANSI, BSW, ASMEGrade ... , 5.6, 6.8, 8.8, 9.8, 10.9, 12.9 etc.Size M0.8~M12Material Stainless, Steel,Brass, Steel ...