Biopsy InstrumentsAE-FR141R, BONE BIOPSY TREPHINE, INNER DIAMETER 6,4MM, OUTER DIAMETER 8MM, 160 mm, 6 3/4″ AE-FR140R, BONE BIOPSY TREPHINE, INNER DIAMETER 3,9MM, OUTER DIAMETER 5MM, 160 mm, 6 1/4″