This brand new laptop bottom case feet are made of high quality rubber, if your chassis rubber feet are damaged, stuck or missing, then you will need this brand new chassis rubber feet from us. Sturdy bottom base rubber feet keep MacBook from sliding on your lap or desk. Compatible with MacBook Pro Retina 13 Inch A1425 (late 2012-early 2013), A1502 (late 2013- early 2015), A2289 (2020) and 15 Inch A1398 (mid 2012-mid 2015). Tip:Not for AIR ( A1370 A1369 A1465 A1466 ) , PRO (A1278 A1286 A1297). Included in the package are 4 replacement bottom silicone feet. Each silicone foot is 0.75" long in diameter.