2.5" Closed Ring with Boss Head Clamp

This 2.5" diameter closed support ring is integrated with an open boss-head clamp and a 5/16" diameter rod — a one-piece support accessory for retort stands. The plated mild steel construction is durable and resists corrosion from routine chemical use. The boss head accepts rods from 5/16" to 5/8" in diameter via a metal thumb screw. Extension distance from the boss head to the ring is approximately 4.25", and the total distance from the boss-head centerline to the edge of the closed ring is 8". Well suited to holding funnels, beakers, and other round-bottom apparatus in place during an experiment.