Product parameter  

Product name	Shade guide
Model	R20
Color	Black
Color type	20pcs
Material	ABS
Function	Record whitening result
Weight	350g

  FAQ: 1. Q: If I want to operate teeth whiten service for my customer, Is this a necessary product?     A: Actually, you need to use it to compare the result. it is more professional.   2.Q: How to use it?    A:Choose same color's type as your customer's teeth, before you operate teeth whiten service,  after the teeth whiten service, then you need to choose other same color's type as the teeth. you can compare the result.     Product display: