Robart Mechanical Nose Retract 10 Size is constructed of glass reinforced nylon. Comes with positive tiller arm steering mechanism, positive up-and-down locks, a smooth, dependable cam operation, and a tempered-steel 1/8" (3.2mm) wire strut. Suitable for up to 4 lbs. (1800g) models and can be operated on any standard or mini servo with more than 48 oz/in (3.5 kg/cm) torque. Ideal as a replacement steering nose retract for our EDF60-70 size models.