... certification3, all kinds of handpieces4, cartridge with folderModel: N-TU2 Big head push-button type high-speed handpiece1. Powerful drive. ... Durable, long operating life 2.Easy changing burs with push-button 3. Easy changing cartridge 4.2 holes and 4 ... 70 dBrotation speed300000-350000 rpmdescriptionbig head,push-button type,three water spray,cartridge with folderDear Friends, Thank you for visiting ...