... ,fiber optic handpiece,high speed handpiece 2.fiber optic dental handpiece 3.torque head triple spray system 1.dental handpiece,fiber optic handpiece,high speed handpiece2.fiber optic ... φ1.6MMstandard burnoise≤70dBrotation speed 300000-350000rpmdescriptionfiber optic,Halogen lampdescriptiontorque head,push-button type,triple spray system,quick coupling,fiber optic,four holes