you can use it when you buy product from my store. This card valur $10 ,but you only need to cost $0.5 you can use it buy Zirconia ,polishing bur ，Lithium disilicate ........etc.

Aidite Lithium Disilicate Burs/ Glass Ceramic Milling Cutters/Zirconia /PMMA Milling bur For Dental Lab Compatible machine  AMD-500/AMD-500E/AMD-500S/AMD-500DCs is the same bur AMW-400S/AMW-400 is the same bur AMM-520/AMW-520  Smile_Zir Milling Burs AIDITE® Compatible Always Choosing The Best Tools for the Best Results For each type...

you can use it when you buy product from my store. This card valur $200,but you only need to cost 188usd  you can use it buy Zirconia ,polishing bur ，Lithium disilicate ........etc.