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LD-101
Lead donut for 125-500 ml glass flasks, 1⅔" inside diameter, 3" outside diameter, and 237 g weight
LD-102
Lead donut for 250-1000 ml glass flasks, 2" inside diameter, 3½" outside diameter, and 454 g weight
LD-104
Lead donut for 1000-4000 ml glass flasks, 2¾" inside diameter, 4½" outside diameter, and 908 g weight