Technical Parameter: MODEL:Rose 201-M4; Lotus 201-B2 DESCRIPTION: E type low speed handpiece 1:1Ratio SUPPLY AIR PRESSURE: 245-392 Kpa (2.5-4.0 kgf / cm2) ROTATION SPEED: 22,000~27,000 r/min CHUCK TYPE: Latch type BUR APPLICABLE: φ2.334-2.335mm NOISE: 65~69dB.