1.size: 2.weight:50g, 3.material:Plastic with stainless steel bolt
4.Feature:
1) Environment-friendly non-toxic material
2)Simple operation
3)It is not easy to break
4)Smooth ball, no injury to the nose
5)The size can be adjusted through screws
6) It is not easy to oxidize
7) Thicker and thicker material, more stable
