507-6558 507-6559 507-6560 5076558 5076559 5076560 323F and With 6-12 months warranty，Any quality problem will send free parts to repair. And this model Final Drive used for excavator hitachi

507-6557 507-6558 507-6559 5076557 5076558 5076559 320E and With 6-12 months warranty，Any quality problem will send free parts to repair. And this model Final Drive used for excavator hitachi

507-6558 507-6559 507-6560 5076558 5076559 5076560 323E and With 6-12 months warranty，Any quality problem will send free parts to repair. And this model Final Drive used for excavator hitachi