Casement Windows ONLY: If your right hand head hinge is an older style and does not look like the hinge that is pictured, then you will also need to purchase the right hand sill hinge for the hinges to work properly. The right hand sill hinge part number is 1361460 for standard size units or 1361468 for egress size units. Egress size is normally used in bedrooms and allows for a larger opening to meet egress code. Awning Windows ONLY: If your right hand head hinge is an older style and does not look like the hinge that is pictured, then you will also need to purchase the left hand head hinge for the hinges to work properly. The left hand part number is 1361463. Awning instructions not included.