![Glass Thickness Gauge](http://www.mstoreonline.co.za/cdn/shop/products/BO_5164900_PF1_C_zoom59e61d890e6ee_720x600_2_medium.jpg?v=1508916180)
Glass Thickness Gauge
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Measures glass thicknesses from 2 to 25 mm as well as the space between panes (up to 24 mm) of insulated glass units
Also suitable for already installed windows
works on the basis of reflection in the glass pane
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Easy to use