... carbon steel and stainless steel,and which is mainly used on the automobile seat belt and others. 4 ... to have high enduring function,and protect the personal safety ,especially the endurance,We have ... UsageAutomotive/Auto/Car,etc.11.Period validityone year12.HRC46-52DEGREE13.The material and specification could ... company! We're manufacture of Coil Springs for TOYOTA,NISSAN,MAZDA,BENZ,VOLKSWAGEN,DAEWOO,ETC ...