Included both or pair left and right speakers and not just speakers but full speaker assembly ready to install, will fit and work perfect like when you first got the device, plug and play.
Compatible withCompatible :
for Apple Macbook Pro A1278 13\" 2009 2010 2011 2012 923-0106
Core i5″ 2.3 13” Early 2011Core i5″ 2.4 13” Late 2011Core i7″ 2.7 13” Early 2011Core i7″ 2.8 13” Late 2011Core i5″ 2.5 13” Mid-2012Core i7″ 2.9 13” Mid-2012.
Compatible model