WE ARE LEADING FACTORY PRODUCE DIE SPRINGS ACCORDING TO JIB5012, ISO10243, GREEN, BLUE, RED, YELLO, ILGHTES LOADING, LIGHT LOADING HEAVY LOADING, SUPER HEAVY LOADING Series: TJL, TJM, TJH, TJB Material: 50CrVa, 50CrSi, 65Mn SUP -12 SUP-10 Working time: 1500000( green-30% , blue-30% , red-25% , yellow-20% ) Using for enjection mould and auto clutch. Exporting packing. SURFACE; ELECTROPHORESIS MATERIAL: 50CRVA, 55CRSI, SUP-12, SUP-10,