New product weight: 0.55g Type: laptop internal speaker Compatible model: for Pro 13 inch A1278 2011 2012 machine Colour: Black Material: composite material Compatible Subfamily: Pro inchCore i5 inch 2.3 13 inch Early 2011 Pro inchCore i5 inch 2.4 13 inch Late 2011 Pro inchCore i7 inch 2.7 13 inch Early 2011 Pro inchCore i7 inch 2.8 13 inch Late 2011 Pro inchCore i5 inch 2.5 13 inch Mid-2012 Pro inchCore i7 inch 2.9 13 inch Mid-2012 Compatible Model No: MC700LL/A, MD313LL/A, MC724LL/A, MD314LL/A, MD101LL/A, MD102LL/A Package Contents: 1x Left and Right Internal Speaker Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.