Product Description Material: 3.3 high borosilicate material Screw specifications: GL32 3. Temperature resistance of bottle cap: 140℃ Coefficient of thermal expansion: 32.1*10^-6/℃ Features: 1. Silicate glass with high temperature resistance, high strength, high hardness, high light transmittance and high chemical stability 2. It has chemical resistance and thermal shock resistance 3. The cap is made of PP material, GL32 international standard caliber 4. The bottle mouth is equipped with a dumping ring to avoid dripping during use.
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