A low profile servo would always be a good choice if your installation space for servo is limited, but you do not want to modify it too much. If the price is also an important factor affecting your decision, then you should take a look at our A50 series servo, which costs less, high reward and durable.
The mainly difference between these two servos is the motor and the parameters. The A50BHL low profile servo is made in brushless motor, its torque can reach 19kg-cm and 0.073Sec fast speed. For the A50CHM servo, it is made in coreless motor, the torque is 18kg-cm and the speed is 0.11sec at 8.4V.
The bottom case of this both is plastic, the top and middle are CNC aluminum casing design. This design ensures smooth operation of servo while maintaining light weight. The middle case comes with red color, it looks more attractive. Smoothly dual ball bearings, high-precision steel gear and programmable digital servo, allow to drive by 2S high voltage, potentiometer angle sensor make this response fast and more stable for RC aircraft and helicopter. It is also suitable for 1/10, 1/12 scale drift car, Touring Car, On Road, boats etc. The waterproof version of these two servos are available.
Please feel free to inquiry if you are interested in it.