Truth Hardware Designed for face-mount applications on single vent awning windows, this operatorâ€™s unique pivot shoe design allows approximately 10" of opening. The double arm design also helps achieve corner pull-in and sash stability of ventilator. Acetal pivot shoes slide smoothly in the track assuring positive operation and creating a self-cleaning action. Available in both front-mount and rear-mount styles. Also incorporating an adjustable stabilizing tab (optional), which helps reduce flexing of window frame during operation. Specifications Arm Length: 11" Finish: Aluminum Mounting style Front : Front Track Length: 13"