Economical version. Made of blue aluminium and having three apertures. Upper surface is lined with cork. This is an economical version of above calorimeters. The body is all in one piece. Its lid with an edge is alsomade of blue anodized aluminium and its entire upper surface is lined with cork. It includes three apertures one for the passage of the stirrer, one of 8 mm in diameter fitted with rubber seal for the passage of the thermometer final one of 40 mm in diameter for closing with rubber stopper for the isolation of the foreign matters after their introduction into the calorimeter.