Truth 14.77 Series concealed egress casement window hinge.
Egress hinge provides wider opening (2-5/8 inch) to meet code requirements.
Long Link: 7-5/8 inches
Short Link: 6-7/8 inches (detachable)
Can be used on windows opening to the left or the right.
Truth 14.77 Part Numbers on Tracks 40941/40942-A; Long Arm Hinge 30463; Short Arm Hinge 30818 ( part numbers may vary).
Priced and sold in pairs - Upper and Lower
This product is similar to or the same as the following part numbers in these brands:
Strybuc Industries: 28-15-9
Truth: 14.77.00.219, 14.77.00.220, 14.77.00.260, 14.77.00.261