Crystal HD Mouth Mirror - #4 with Soft Grip, Gray 12/Pk. 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. Contains Antimicrobial Protection. Package of 12 mirrors