Eisco labs proudly manufactures its own products using state-of-the-art equipment, and following the highest standards of quality control. Laboratory grade metalware Set - Support Stand 8" x 5. 25", rod 23" l, 045" dia. 10x. 5 thread, 4 prong, cork lined Clamp and Retort Ring 2. 6" dia1 base, clamps and ring, 1 retort ringthis premium set includes a stand, 1 bosshead, 1 4 Prong Clamp, 1 Rod