Seward ECO bags for the Seward Stomacher® 400 EVO are ECOnomical and ECO-friendly. Seward ECO bags provide the ideal solution for streamlined labs. Save up to 25% on annual consumable costs with Seward ECO bags, compared to cost of Seward standard bags. Choose from two Stomacher® 400 bag sizes specifically suited to performing sample preparation methods for 25g Pathogen tests and 10g TVC tests. Less cost. Less wastage. Greater value for your lab.