Stomacher® 400 Classic Bags are irradiated sterile, single-use blender bags compatible with all makes of paddle blender homogenisers, sized at 177×305mm for sample volumes of 80–400ml. Available in four variants — Standard, Strainer, Lateral Strainer and Closure — each engineered for a specific sample type. Seward's most widely used bag range for food microbiology, life science and environmental testing laboratories worldwide.