521-3341 333-2951 441-3007 5213341 3332951 4413007 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

441-3013 353-0545 333-2951 4413013 3530545 3332951 318E 318F 323D2 and With 6-12 months warranty，Any quality problem will send free parts to repair. And this model Final Drive used for excavator hitachi