... , Sumitomo, Komatsu, Daewoo, Hyundai... * best quality O-ring kit (box) * supply o-ring kits for Caterpillar, Hitachi, Kobelco, Sumitomo, Komatsu, Daewoo ... Mottrol Construction Machinery Co., Ltd is located in zhuji Industrial Zone Dongpu GuangZhou China from 2003. Supply the excavator parts ... seal kits, Swing pump seal kits, any excavator o-ring box, o-ring kit. 2. seals: rod seal IDI, dust seal ...