Parameters
1. Finely processed two-stage metal shock absorber
2. Hole spacing---weight: 70mm-16.5g; 80mm-18g; 90mm-19.5g; 100mm-20.5g; 110mm-21.5g; 120mm-22.5g (single piece weight)
3. Shock absorber outer diameter: 15mm
4. Spring wire diameter: 1mm
5. Ball head inner hole diameter: 3mm
6. Needle head diameter: 3.5mm
7. Ball head width: 7.5mm
8. Equipped with soft spring, adjustable hardness; equipped with rubber ring.