... 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 for water position.The category is as follows ... temperature: 260°C, Working pressure: 4.4MPa. Level Gauge Glass Physical Property1. Appearance1) Air bubble:Diameter≤0.5mm, in the 10mm x ...