GP Mechanical Main Retract 40 Size is constructed of glass reinforced nylon. Comes with positive up-and-down locks, a smooth, dependable cam operation, and a tempered-steel 175 x 3.5mm wire struts. Suitable for up to 6 lbs. (2725g) models and can be operated on any standard retract servo with more than 92 oz/in (6.6 kg/cm) torque. Set up for 88° degrees of movement, compensates for 0° to 2° wing dihedral.

Ideal as a main retract for any 40 Size model airplanes.