Truth Hardware For the window design that requires a face-mounted operator, Truth has developed a special version of our Awning Roto Gear Operator that incorporates the case from our 22 Series Operators with the functional capabilities of the 11 Series Awning Roto Gear Operator. This operator is designed to provide positive control of the sash in any position, while producing a secure pull-in of the window at itsâ€™ corners. A simple detach feature is available that disengages the operator from the sash for quick window removal and for ease in installation. Available in both front-mount and rearmount models. Also incorporating an adjustable stabilizing tab (optional), which helps reduce flexing of window frame during operation. Specifications Overall Width "A": 21 1/2" Arm Clearance "B": 11-32" Dimension "C": 1-1/2" Finish: White Mounting style Rear : Rear Approximate Sash Opening : 15"