1. Made of Nylon 66 materials, features: a. anti-corrosive, the elasticity is good and the assembly is not easy to burst; b. wear-resisting; c. the appearance is neat.

2. The button putter is made of POM, features: a. the material is slick and hard; b. wear-resisting; c. The feel is good, and each spot is clearly demarcated.

3. The electronic contact and post is adopted: a. copper with silver-plating; b. stock thickness 50um. Features: a. The electric conductivity is good; b. the contacting feature of Electronic contact is good and it’s not easy to oxidize; c. the post and the outer covering with inlay the form two formings , the polarization is good and not easy to become loose.