Now through April 30th, 2020, save 15% on ProNex®️ Size-Selective Purification System. To apply the discount to your order, simply enter PRONEX15 during the billing stage of checkout. Valid only on orders through Promega.com on NG2001, NG2002, NG2003. One time use only. Not valid with any other promotional offers. For U.S and Canada customers only.