Tooth #31 MO for Advanced Standing Dental Program Bench Exams – Mandibular Right Second Molar, made of Ivorine. Prepared by Kilgore for a large class II cavity and ready to fill with amalgam or composite. Does not include screw. Shipped in a sealed bag. NOTE: this prep does not reflect an ideal Class II, but a larger than normal cavity design and should not used to guide you with ideal class II outline forms. It is sold for practicing large class II fillings.