Sudden and drastic temperature loss, recovery time and change in pH are minimized when you will use warming blocks.  The unique aluminium alloy conducts heat and provides almost direct thermal contact with the heating surface.  

In this way set, we are providing 1 no. of round block which can accommodate 7 tubes of 14 ml each and 1 no. of angular block which can position the tube at 45 degree angle.  Both the blocks are made of aluminium alloy for efficient heat transfer.