VSP Upgrades - Cooling Coil Option - The external cooling coil assembly is built as a reusable sleeve that slides over a standard VSP2 cell. It is positioned directly on the test cell above the auxiliary heater. The inlet and outlet of the coil attach to two straight-through bulkhead fittings (included). Also included are two 1/8" ball valves to isolate the inlet and outlet lines external to the vessel. The user must supply a source of cooling fluid. (1/8" diameter cooling coil and bulkeads also available.)