For cleaning surface of tooth, moving plaque and stain instant . Anti-resorption device can availably fend dental unit. SPECIFICS: Water supply pressure0.2MPa-0.4MPa Air supply pressure0.2MPa-0.3MPa Max water spraying: 0.2mL/S Max sand spraying: 0.03g/S JOINT: 2 hole for NSK 4 hole for NSK Austoming joint