Aluminum heat transfer block. It will hold 25, 50, 100,250 and 25mL round bottom flasks, one hold on the top for the standard thermometer.

Aluminum heat transfer block, used in place of a glass sand both in microscale experiments. It has holes to hold 3.0 and 5.0mL heavy wall reaction vials and four Craig crystallization tubes, one hold on the top for a standard thermometer.

Aluminum heat transfer block. The hold on the top for the standard thermometer.

Aluminum heat transfer block, used in place of a glass sand both in microscale experiments. It will hold 5, 10 and 25mL round bottom flasks, one hold on the top for a standard thermometer.