Taq 2X Master Mix | NEB
https://www.neb.com/products/m0270-taq-2x-master-mixTaq 2X Master Mix should be used at a 1X concentration with DNA template and primers in a total reaction volume of 25 or 50 μl. Taq 2X Master Mix is stable for fifteen freeze-thaw cycles when stored at -20°C. Taq 2X Master Mix is also stable for three months at 4°C, so for frequent use, an aliquot may be kept at 4°C. Protocols, Manuals & Usage.