Package includes: 4 * Bottom case rubber Feet Applicable models: Macbook pro 13" A1278 2009 2010 2011 2012 Macbook pro 15" A1286 2009 2010 2011 2012 Macbook pro 17" A1297 2009 2010 2011 Note: Not for macbook pro retina series. Foot installation method: 1.Using a screwdriver, separate the bottom case by removing the 10 screws. 2.Clean the bottom with a dry cloth, make sure that the foot area on the bottom case is clean and free of debris. 3.You can install foot directly, however, in order to keep the foot fixed better, you can use heating tool (such as hair dryer) to heat the foot area on back of bottom case, and then put on rubber foot when the foot area is hot. 4.Please keep pressing the rubber foot until the foot area cools down. 5.After the heating place cooling down, clean and install the bottom case.