The Radnoti #120147 adapter fits between the heart chamber and the buffer reservoir. The two Luer side ports permit the addition of new medium or the sampling of effluent, as well as permitting the gassing of the heart chamber with nitrogen during hypoxia experiments. Constructed of borosilicate glass. The Radnoti #140132 adapter converts the heart chambers 24mm ground glass exit port to a female Luer fitting for easy connection of tubing for the collection of or draining of chamber fluids. The Radnoti #140131 adapts the buffer reservoir Radnoti #120146 to a female luer fitting for easy connection of tubing for the collection