All brass. Threaded plain water gauge without drain or stop cocks, suitable for small boilers. ¼"- 40; 3/16" glass, with bushings.

To cut the glass, make a small notch in the side of the glass tube using a small triangular shaped file. Hold the glass tube with both hands and make a bending motion at the notched point on the tube.

CAUTION: Wear strong leather gloves & eye protection while cutting glass.