Various Borosilicate gauge glass made from high pressure, high temperature borosilicate glass, Reflex, plain, Level types etc. reflex gauge glass made from high pressure, high temperature borosilicate glass 1. Resist working temperature: 260°2. Water pressure : 4.41Mpa3. Resist water: <0.5mg/dm4. Resist acid: <0.5mg/dm5. Resist alkali: <80mg/dm