... level gauge glass also named Sight Glass,Reflex Glasses,Level Gauge Glass,Spares for level gauge,Boiled Gauge Glass,Boiled Parts,ectIts made from Borosilicate, it is used in lever gauge in boiler ... temperature: 260°C, Working pressure: 4.4MPa. Level Gauge Glass Physical Property1. Appearance1) Air bubble:Diameter≤0.5mm, ... Bend-resistance≥80MPa Borosilicate Reflex Gauge Glasses -oil boiler gauge glass