... Borosilicate, it is used in lever gauge in boiler for water position. Level Gauge Glass It’s made ... from Borosilicate, it is used in lever gauge in boiler for water position.It is also named: Reflex Gauge ... ) x 17mm, 218 x 34(30) x 17mm, 190 x 34(30) x 17mm165 x 34(30) x ... x 34 x 17mm, 218 x 34 x 17mm, 190 x 34 x 17mm165 x 34 x 17mm, 140 ... 215 x 34 x 22mm218 x 38 x 23mm, 190 x 38 x 23mm, 165 x 38 x 23mmThe ...