The ViewRNA Tissue Positive Control Kit (2-Plex) is designed for use with the ViewRNA Tissue Assay Core Kit (1-plex) or ViewRNA Tissue Assay Blue Module. This positive control kit includes 4-6 μm thick rat kidney FFPE sections attached to positively charged slides as well one vial each of TYPE 1 rat Spp1 and TYPE 6 rat Ubc probe sets.