The Castroviejo Surgical Caliper – Straight Tips, 18cm, 0–40mm is a precision measuring instrument designed for accurate intraoral, periodontal, implant, and maxillofacial assessments. Featuring straight measuring tips, a 0–40mm measurement range, and a smooth adjustment mechanism, this reusable stainless steel caliper delivers reliable dimensional accuracy for bone evaluation, graft measurement, and surgical planning procedures.