mmobiel high quality speaker set left and right: 100% new mmobiel replacement compatibility: compatible with macbook pro retina 13' a1278 model year range mid 2012 2013 2014 2015 product nr: mc700 md101 md313 important: please check the model number before purchasing this item. you will find the model number on the back of your device (see product images on the left) easy installation: replace your faulty speaker set left and right and pre-installed adhesive stickers. high quality product by mmobiel: each part is tested before shipment, item in stock.