PRESSURE EQUALIZING FUNNEL WITH GLASS STOPCOCK

With standard taper glass outer joint at top and innner joint at bottom,with a glass stopcock upper on the bottom glass joint.
Laboy glass flasks are heavy wall designed,made by hand-blowing to ensure uniform wall thickness, made of high-quality borosilicate glasss and annealed at 800 degree Celsius ,can be heated directly in an open flame and can withstand typical laboratory thermal variations in chemistry processes like heating and cooling.