9 Inch Tall Cast Iron Tripod Support Ring
by American Scientific

Designed to support various sized of crucibles and glassware, this concentric ring support stand features an large outer ring with an outside diameter of 153mm (6 inches) and an inner diameter of 123mm (4.9 inches). The two smaller, removable rings have an outside diameter of 127mm (5.1 inches) and 102mm (4 inches) respectively, as well as insides diameters of 97mm (3.9 inches) and 73mm (2.9 inches). Each ring also features a small lip that is approximately 3mm (0.12 inches) along the inner edge.

The three zinc-plated legs are detachable, and have no slope to them. The rings themselves are made of cast iron, and feature a chemically resistant gray enamel finish.