Balanced, high-strength, low-vibration frame Tight-tolerance, low-resistance upgraded hardware Heavy-duty, carbon-steel hex screws with composite insulators Precision-wound coils with heat-resistant, resin coil-washers Smooth and powerful operation Frame Material - Work-hardened frame, press-cut from 1018 cold-rolled steel Construction - Hand assembled Color - Bronze Recommended Use - Multi-use (Liner or Shader) Machine Weight - 6.5 ounces # of Coils - Dual (2) Ten-wrap Coils Coil Size - 3/4" OD (outside diameter) x 1" tall Coil Diameter - 11/32 inch Impedance - 4 ohms Capacitor - 47 uf / 63 volt Spring Thickness - 0.45mm rear spring and 0.50mm front spring A-Bar Material - Low-carbon steel Front Binder - Solid brass with #6 contact screw Rear Binder - Solid brass Working Voltage - 5 - 9 volts Optimum Voltage - 7 volts Running Speed - 64 Hz (hertz)