Clamp Retort - 4 Prong, Chrome plated-EIS-CH0682A offers a thoughtfully designed, durable resource for hands-on learning. Diecast in alloy, with other parts of plated brass, clamp acceptsÂÂ articles from 2-90 mm diameters . The design of the jaw ensures aÂÂ firm grip at all angles of opening. The cork liners for the jaws are wellÂÂ secured. Overall length 25 cm.