This tooth is from a great white shark (Carcharodon carcharias) and is the longest part of the lower right first incisor, measuring 53.4mm. It is the functional tooth at the first position in the tooth row. Typically, lower teeth are used to pierce prey. Because of this, the tip and the base of the crown are subjected to significant stress, and in adult teeth over 40mm, some part is always damaged, so complete teeth are almost nonexistent. It's like a predetermined fate. This tooth, despite being 53.4mm long, preserves its complete form. Furthermore, the lengths of the left and right cutting edges of the crown are both approximately 40mm (distal edge of the crown 39.9mm, mesial edge of the crown 40.1mm), forming an isosceles triangle. The root is thick, measuring 12mm. It has the characteristic thickness of the lower jaw, known for its robustness. You can see the unique features of the first incisor, with a very long mesial root and a short distal root. Both the crown and root are white, and the serrations are complete without any chips. As a lower tooth, I only possess this one tooth of this size and in such perfect condition. I doubt you'll find a lower tooth of this quality anywhere else.