Adjustable elbow Three different angles (10, 15, 20) can be combined freely to create bends of any size. Miter Bend PipingCold rolled steel sheet, outer surface with powder coat, inside with nontoxic wearable lining. Stainless steel sheet, mirror finish Size other than those listed are also availableThree di fferent angles (10°, 15°,20°) can be combined freely to create bends of any size.