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ES series ball joint features: 1. Circle swing agilely without any blocked 2. Surface treatment: Zinc plated, inner parts are full of lubricate oil 3. Precision of serewthread grades"6H" 4. Ball joint shaft: Steel bearing, shaft C35, 4Cr41 steel 5. Ball joint housing: 45# 6. Work on -40~120c temperature. Excellent performance 7. Standard reference: QC/t327-1999&relative standard
ES series Ball Joint