United Scientific® Support Ring With Opening

United Scientific® Support Ring With Opening by United Scientific is a zinc-plated steel extension ring with a side gap, used to hold funnels, boiling flasks, and separatory funnels on a support stand. It has a 7 mm (0.27") rod with a 7.25" (184 mm) straight section and comes in 2", 2.5", and 3.25" inside diameters. Teaching, chemistry, and general research labs use it for filtration and extraction setups.