NTI Silicone Polishers, RA, Flame, # 050, 5 mm, Pink, 10/Pk. The NTI Pink Silicone Polishers are one-of-a-kind rotary instruments that produce a high shine on ceramics, composites, acrylics, alloys, and gold surfaces while conserving the material's structure. These autoclavable silicone polishers are suitable for handpieces that run at slow speeds.