https://www.kavalier.cz/en/simax-professional/simax-glass.html https://www.kavalier.cz/en/simax-professional/simax-glass.ht... "Simax glass ranks among the typ

https://www.kavalier.cz/en/simax-professional/simax-glass.html https://www.kavalier.cz/en/simax-professional/simax-glass.ht... "Simax glass ranks among the types of glass of the group of clear „hard“ borosilicate glass „3.3“, which excel in a high heat and chemical resistance and which are defined by international ČSN ISO 3585 Standard. It complies to the full with the properties prescribed by these standards."