... quality,precision machining Track link for excavator & bulldozer High surface hardness Self-marketing, reducing profit of reseller Good qualityTrack link/track chain ... for excavator and bulldozer1 .Material: 40MnB2. Technology: forging casting 3. Surface hardness :54HRCDeepth: 4mm-10mm3. Pitch:101,135,154,171,175 ...