Place of Origin : Hengshui,China

It is made from Borosilicate, it is used in lever gauge in boiler for water position.
It is also named: Reflex Gauge Glass, Sight glass, Reflex Glasses
Reflex sight glass, Spares For level Gauge
The category is as follows:
1) Three tendons (four grooves)
2) Two tendons (three grooves)
3) Plan transparent
Size:
340 x 34(30) x 17mm 320 x 34(30) x 17mm,
280 x 34(30) x 17mm250 x 34(30) x 17mm, 218 x 34(30) x 17mm, 190 x 34(30) x 17mm
165 x 34(30)*17mm
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