This carton contains the true science behind the 'magic of deionized water technology. It will refill a DIC-20 three times or the DI-120 (or DI-10) six times. We worked hard to develop this resin formula that provides the performance we demand from our systems. We test every batch before it leaves the warehouse to ensure you receive a quality product that we gladly stand behind. Don't risk your work surface finish with anything other than proprietary, quality resin from CR Spotless!.