Roti®-Prep Plasmid MINI columns for additional DNA-extractions DNA-extraction columns for the Roti®-Prep Plasmid Kit Replacement columns and 2 ml tubes for additional DNA-extractions using the buffers of the Roti®-Prep Plasmid MINI Kit (Art. No. HP29). Detailed instructions-for-use can be found there. Not suited for Roti®-Prep Plasmid MINI-XL (Art. No. 8546).