Features:1. Dental shade guide is professional teeth whitening color palete for comparison before and after whitening ​2. VITA toothguide 3D master is for comparing teeth shades before ​3.Teeth whitening products colorimetric plate is brand new and high quality ​4. 29 shades with laser engraved numbering for longer use Improvement of your own shade management ​5.Dental shade guide VITA comes in stylish aluminum case, portable and easy to keep Convenient to use. ​6. Germany's genuine VITA Toothguide 3D shade guide uses VITA Toothguide 3D shade guide to accurately and systematically determine all natural tooth colors. ​7. It is a color comparison system designed according to the color space sorting theory on the market at present. The color of teeth is determined by three Value of brightness, colour saturation and Hue.How to use:Use the teeth shade guide to record the color of customer's teeth before the treatment, find proximate color then take out to do comparison after the treatmentSpecifications:Product name: Dental Bleaching Shade Guide ​Used For: Teeth Whitening Colorimetric Plate ​Type: 29 Colors ​Meterial: Plastic, Composite ResinNote:1. Please allow 0.1- 0.5cm error due to manual measurement. Please make sure you do not mind before you buy. ​2. The colors may have different as the difference display, please understand