ProductsDehydrated mediaB12 Assay Medium B12 Assay Medium SKU: QB-42-0211 Unit: Each Brand: NUTRI-BACT B12 Assay Medium Other products from «Dehydrated media» KCN Broth # QB-1L-2220 Koser Citrate Medium # QB-68-2213 Soybean Casein Digest Broth, USP # QB-44-5016 Lactobacillus Selection Agar # QB-1L-2295