All purpose replacement speakers 57MM.

• Diameter : 57mm
• Packaged Volume : 0.12l
• Packaged Weight : 0.05kg
• Packaged Length : 6.3cm
• Packaged Width : 6cm
• Packaged Height : 3.1cm
• Speaker Type : Hobby Speaker
• Nominal Impedance : 8?
• RMS Power Rating : 250mW
• Side-to-Side Diameter (A) : 57mm