Andis AG Clippers run quietly and coolly without need for vent holes that could take in hair and dander. Durable housing remains cool to touch even after long operation. Blade assemblies are detachable and can be changed quickly. Blade sets are interchangeable between Oster A-5 and Andis AG clippers. Andis blades are made of high carbon steel, hardened for long cutting life. Provided with a #40 surgical blade. 110V, 60 Hz.