Specification:Material: Plastic + Aluminum alloyColor: Multi colorsBox Size: (L)X(W)X(H) 23.5X8X4.5cm /9.25"X3.15"X1.77"(appr.) FeaturesLow noise working, high efficiency2-Hole standard push button handpieceOnly for people who have dentistry medical qualification.With high-speed turbine rotation, it has better performances.Special for operations such as clamping high-speed dentistry machine needle to drill and grind teeth in department of stomatology, it is more professional. Air Turbine Handpiece- Needle Change Type:Push button- Air Pressure: 180~250 KPa (1.8~2.5 kgf/cm2)- Water Pressure: 198Kpa (2 kg)- Rotation Speed: 370,000-420,000 rpm- Bur Applicable: φ1.59mm~φ1.6mm- Noise: ≤70dB Contra angle handpiece- Low Speed 22,000-27,000 rpm.- The shank of the instrument mounted therein is 2.35 mm- Fastening of the instruments with a turning latch- Autoclavable 135°C- For any lab or E-type motors Straight Nosecone- Working pressure: 0.3MPa (4-hole);- 0.25MPa (4-hole) (Measure meter is installed at the end of air motor  to measure the air pressure).- Revolution: about 22000-27000r/min (adjustable between clockwise or  anticlockwise)- Noise: ≤68dB- Air consumption: about 56L/min- Ratio: 1:1- Max speed of contra angle: 25000rpm/min. Air Motor- Supply air pressure:  245-392KPa (2.5-4kgf/CM2)- 1:1 Direct Drive- Borden 2 holes- Max speed 20,000 min-1 Package included: 1 X Straight Nosecone1 X Contra angle handpiece2 X Air Turbine Handpiece1 X Air mortor2 X Black kit for low speed handpiece1 X Pipe for the motor of low speed handpiece2 X Pentagram shaped kit for screwing the back cover of the handpiece Notice:Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering.Please understand that colors may exist chromatic aberration as the different placement of pictures.