1, Swing circles for Komatsu Excavators 2, Good quality, Low price, Quality Garantee 1. Our company is Excavator Parts Manufacturer. We produce excavator bucket, pin, bushing, arm, boom, undercarriage parts, travel reducer & inner parts, swing machinery & inner parts, long reach boom and so on. 2. We produce buckets for KOMATSU, KOBELCO, CATERPILLAR, HITACHI, DAEWOO, VOLVO and other brand ...