Metric NBR O Ring box for Excavator 1)Material: rubber NBR 2)Application:Komatsu and ... many more 3)warranty:1 year Metric NBR O RING Box FOR EXCAVATOR: VOLOV, KOMATSU, KATO, KOBELCO, HITACHI, CAT, SUMITOMO, DAEWOO ... you with detailed inquiry of any types of O ring box.