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Model: BJM13(12.7mm, 12.9mm), BJM15(15.24mm, 15.7mm). 2. For Strands Number: 2 strands, 3 strands, 4 strands, 5 strands. 3. Materials: Anchor Head Materials: 45# Steel, Wedges Materials: 20CrMnTi. 4. Full Complete Parts: Flat Anchor Head, Wedges, Anchor Bearing Plate, Spiral Spring Ring. 5. Anchor Head Hardness: HRC25-36. Wedges Hardness: HRC58-65.