RETORT RING – GUPTA BRAND 10007014I Posted on February 23, 2017May 1, 2017 by admin Malleable iron, ring and arm of strong circular section, with open boss fitted with thumb-screw to clamp on stands. Distance between centre of ring and supporting rod is 12cms. Fits rods upto 13mm. Diameter Inside:5.5cms, 7.5 cms