Macbook pro rubber feet pad set include out feet , inner plug. Anti-slip Rubber feet is used for supporting the whole MBP, with 3m self adhesive sticker. The adhesive pasted on adhesive rubber feet, is one kind of  two sided sticky tape that comes off easily, super glue is necessary to stick them tightly. Macbook pro foot-out feet is made of rubber,but the out feet is a little harder than original. And the macbook pro feet-inner foot is made of plastic. mbp 13 mbp 15 mbp 17 MacBook Pro screws beside macbook pro replacement rubber feet, used as macbook bottom case screw are very small, a small amount of thread-locking cement to the threads (arrow) can help preventing them from loosening before inserting. a small amount of residual blue locking cement on the screw tip shows as the picture. There are 3 types of macbook rubber feet, check serious No. at the bottom case before order.This kind of bottom case screw and rubber feet are fit for macbook PRO mac 13 mac 15 mac 17 A1278 A1286 A1297 ONLY ,not for AIR ONES( A1370 A1369 A1465 A1466 ) PRO RETINA ONES(a1425 a1502 a1398)