Ring Stand 4x6" base, 18" RodHeavy stamped steel base.Support Stands, and Rings: 4" x 6" (each)General DescriptionStamped steel bases, with black enamel finish. Removable, zinc plated, steel rods.Burette Clamps: Coated Jaws General DescriptionExcellent for holding small objects. The round jaws open from 15mm to 45mm (1/2" to 1 3/4"). The clamp attaches to rods up to 13mm (1/2") O.D. Jaws can be rotated and locked at any angleSteel ring clamp 4" in diameter