Double Funnel Holder This versatile Funnel Holder is supports several sizes of funnels from 25 to 152mm (1" to 6") top diameter by simply changing the included adapter ring. Features Double holder ( pictured) supports two funnels Clamp fits standard support rods, 12.5mm (1/2") and includes an adapter to fit to narrower 9.5mm (3/8") rods. Non-corrosive HDPE funnel holder and clamp includes two bushings for 12.5mm (1/2") or 9.5mm (3/8") diameter support rod molded of rugged and easy to clean high-density polyethylene.