Used for canal enlargement to prepare the root canal for irrigation and obturation in continuous rotation or depending on the clinical situation, also in reciprocal motion. - Taper: 4%. Pack Contains: - 1 x Orifice Opener 17 mm. - 1 x #20 - 25 mm. - 1 x #25 - 25 mm. - 1 x #30 - 25 mm.