There are many people who have doubts, focusing on whether the material is plastic or rubber?

Silicone rubber is widely used in aerospace, rail transit, electronic appliances, biomedicine and other fields due to its excellent elasticity, weather resistance and physiological inertia.

The silicone rubber widely used in China is the vinyl silicone rubber successfully developed in the 1960s. The main brands are 110-1, 110-2 and 110-3.
Phenyl silicone rubber is obtained by introducing diphenylsiloxane chain or methylphenyl siloxane chain into the molecular chain of vinyl silicone rubber.
The former is called diphenyl vinyl silicone rubber (referred to as diphenyl silicone rubber for short). It was identified and put into production in the 1990s, with 120-1 and 120-2 brands; The latter is called methyl phenyl vinyl silicone rubber (abbreviated as methyl phenyl silicone rubber), and the domestic product was developed a few years ago.

The introduction of trifluoropropyl into the molecular chain of vinyl silicone rubber is called fluorosilicone rubber. The fluorosilicone rubber has better low temperature resistance and oil resistance.

For silicone rubber, please check the details:
https://www.siliconerubbers.net/product-general-grade-htv-silicone-rubber.html