Crystal HD Mouth Mirror Head - Size #5 Blue, Plastic 12/Pk. Screw On Head, Cone Socket. 40% brighter than rhodium mirrors. More scratch resistant. Reduces eye strain and fatigue. Lens is flush with mirror frame, eliminating the possibility or corrosion build-up. Eliminates galvanic shock. Autoclavable up to 136 degree C /275 degree F. **Compatible with CONE SOCKET mirror handles only. Reduces eye strain and fatigue. 40% brighter than rhodium mirrors. Minimizes the possibility of corrosion build-up. Lessens risk of galvanic shock. Crystal HD Plastic Mirror Heads are superb dental mirrors that are 40% brighter than rhodium mirrors, reducing eye strain and fatigue for dentists. The lens is designed to flush with the mirror frame for minimized corrosion buildup.The soft grip feature of the mirror eliminates the risk of galvanic shock. Available in various sizes and colors.