1.5 x 6.25 x 2.25. Lymphocyte depletion."Pump housed in a green metal case with a clear plastic top and a metal tag that reads."Property of Medical College of SC M17-194" This is the second model of the pump which used to pump lymph from the thoracic duct to the venous system once the duct was cannulated. The pump sensed flow and could regulate itself to pump at the rate of flow without adjustment. It injected heparin into the outflow to prevent clotting and an offsetting drug into the return flow to return the blood to a normal clotting time."