Designed to pre-warm solutions before they enter organ baths or single cell electro-physiological systems, these units have internal capacities of approximately 1.5, 5.5, and 10ml. The fluid moving through the coil is rapidly warmed by the outer water-jacket, which uses the Radnoti Quick Disconnect fittings. The ends of the coil terminate in female Luer fittings that may be inserted into tubing or used with Luer valve fittings. For optimal temperature control, we suggest the use of Radnoti Water Jacketed Flex Tube system to link an unheated reservoir to the heating coil.