The Recyclable Sandblaster is used to polish the surface of the metal castings (denture braces,crown and bridge casting rings) in restorative dentistry. It is used eapecially to remove the oxide layer and remaining investment materials. It achieves automatic sand circulation according to the principle of pneumatic negative pressure siphon. It also has a delicate design and strong compatibility and it is easy to repair. It also has the following characteristics: large and wide observation window, strong blasting power. The sealant used on the machine is used for car windows. The cold light source gives better visual effects.