The TSU AFX Large Applicator is both large and very robust, designed for heavy-duty work on large adult fish or mammals. The Tissue Sampling Unit (TSU) applicator is used in conjunction with the TSU to collect the sample by cutting the tissue and sealing it into the TSU vial. Allows clean, easy, and efficient collection of tissue samples for DNA analysis without the need for any hand cutting with scissors or use of tweezers.