Low Energy Consumption: All adapters are totally tested: ageing test, material test, over-voltage test, over-heat test, safety test; the comb points immoderate performance and low energy consumption. Product Type: The alternative components for comb. Precision Edge: Exchangeable trimmer is designed for proper shaping. Wide Application: Suitable for HC3400 HC3410 HC3420 HC3422 HC3426 HC5410 HC5440 HC5442 HC5446 HC5447 HC5450 HC7452 substitute hair clipper. Color: gray Material: ABS Package Contents:1 x comb Only the above kit content, diversified merchandise should not included. Note: Light and diverse reveals could cause the color of the item in the picture considerably diverse from the real thing. The measurement allowed error is +/- 1-3cm.