The price is for one piece.Material: zinc alloyColor: Brushed Gold BrassMeasurement:Length: 2.0' (50 mm)Width: 2.0' (50 mm)Back Plate dia :1'(25mm)When installed the knob sticks out 0.87' (22 mm)Screws:1.0’’ (25 mm) as default.Screws are available in 0.79’’(20 mm), 1’’( 25 mm), 1.18’’( 30 mm), 1.38’’( 35 mm), 1.57’’( 40 mm), 1.77’’( 45 mm), 1.97’’( 50 mm).If you have special requirements on screws, please feel free to let me know.