Recoil Springs: High quality steel 60Si2Mn or 60Si2CrProper heat treatment processFull range adaptable to Caterpillar, Komatsu, Hitachi, Kobelco, Kato, Sumitomo, Daewoo, Hyundai. 1156427 1453036 1793035 3034934 3036410 3037627 3050436 3074784 141-30-34112 144-30-14150 175-30-34180 175-30-34190 2417P272 2417P273 2P9666 2V7439 2V7440 2V7441 2V7442 3P1459 3P1465 3P1885 4I7401 5K2754 7K0639 7Y0631 7Y1606 8K2331 D31-17 E120B EX120-1 EX200-1 EX200-A EX300-1 EX45 HD1250 LS2650 LS2800 MS120-8 MS180-8 PC120-5 PC200-5 PC300-5 PC400-5 PC60-6 SK045 SK120-3 SK120-A SK200-3