The Manual Differex™ Magnet has two different positions. Because the position and shape of the pellet formed after each centrifugation step differs slightly, the resin will migrate to the magnet and cap the sperm pellet. The two separate magnets allow the DNA IQ™ Resin to form a better cap over the pellets. The aqueous epithelial DNA-containing fraction is removed while the tube is in the magnet holder. The resin-capped pellet is washed with no centrifugation required.