Dear,I want to introduce my company to  you. We are borosilicate glass manufaturer in Hebei China,with the  history more than 20 years. Borosilicate gauge glass and glass gaskets, KLINGER quality  and normal price.
    1.Glass size : (reflex glass and plain  glass)
      400 x 34 x 17 mm, 370 x 34 x 17 mm, 340 x 34(30) x 17 mm  
      320 x 34(30) x 17 mm, 300 x 34(30) x 17 mm, 280 x 34(30) x 17 mm  
      250 x 34(30) x 17 mm, 220 x 34(30) x 17 mm, 190 x 34(30) x 17 mm  
      165 x 34(30) x 17 mm, 140 x 34(30) x 17 mm, 115 x 34(30) x 17 mm    

   2.Round  sight glass: all kinds of size 

   3.Glass  gasket: non asbestos gasket, graphite gasket and mica gasket. 

The logo,your  brand or other words can be printed on the glass according to your  requirement.  FREE samples will be sent if you need.