The Kitronik mini 180 degree resin gear servo SG90 is a great value multi-purpose micro size servo that is ideal for use with micro-controller systems like the BBC micro bit, Arduino, Raspberry Pi and PICAXE. It's miniature size also makes it great for use in radio controlled models.
This servo can rotate approximately 180 degrees, 90 in each direction It comes with mounting screws and a range of horns to suit most applications
