Order Difco Granulated Agar from ISSS. We offer Difco Granulated Agar to Federal, State, University and scientific communities worldwide. Difco Granulated Agar by Difco may be available in an alternate sale unit size, please check the complete list: Click here! We also offer complete spreadsheets of all Difco and BBL agar & broth products via e-mail upon request. Discounts on Difco Granulated Agar and all Difco products for resale and bulk orders are available