... Spec.:10",12",14",16",18",22'', 24" casement stay window hingeAnti-drop, double-safety design Material: SS304, or SS301, SS201 ... , KB220 is suitable for side-hung outward opening aluminum window or PVC steel window.3. steel and nylon composite slide to provide ... corrosion.5.OEM service and custom design available. casement stay window hinge