product weight: 0.55g/pcs Type: laptop internal speaker Compatible model: for MacBook Pro 13 inch A1278 2011 2012 machine Colour: Black Material: composite material Compatible Subfamily: MacBook Pro inchCore i5 inch 2.3 13 inch Early 2011 MacBook Pro inchCore i5 inch 2.4 13 inch Late 2011 MacBook Pro inchCore i7 inch 2.7 13 inch Early 2011 MacBook Pro inchCore i7 inch 2.8 13 inch Late 2011 MacBook Pro inchCore i5 inch 2.5 13 inch Mid-2012 MacBook 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 include: 3 x Left and Right Internal Speaker Only the above package content, other products are not included. Note: Light shooting 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.