Crystal 4-piece set For BMW 3 Series i3 Gear PaddleThe difference between lead free crystal and lead crystal Lead free crystal: By mixing a new type of element into the glass instead of the lead used in the original production process. The new generation of lead free crystal products has significantly improved the surface hardness, is difficult to scratch, and is flexible, so it is not easy to break, which greatly enhances the service life. It does not contain lead and is more healthy and