HotStarTaq Plus Master Mix Kit (250) For 250 x 20 µl reactions: 3 x 0.85 ml HotStarTaq Plus Master Mix, containing 250 units of HotStarTaq Plus DNA Polymerase total, 1 x 0.55 ml CoralLoad Concentrate, 2 x 1.9 ml RNase-free Water HotStarTaq Plus Master Mix Kits offer all the benefits of great specificity, sensitivity, and performance as HotStarTaq Plus DNA Polymerase NOW in a master mix format, which offers even faster results and added convenience.