and high quality. Made of rubber material, the foot pad is durable and wear-resistant. It can be easily install on the bottom of the laptop for anti-slip. Convenient and practical, for Pro 13inch A1278 / 15inch A1286 / 17inch A1297. How to : Remove the bottom case and wipe the dropped with a dry cloth to remove the dust, but not wet. Heat the dropped with a blow dryer, when it is hotted, stick on the rubber foot directly. On until it is cooling, then tighten the bottom case, toast the cylinder with a lighter, after dissolving, quickly press to let it stuck in the bottom case. Type: Laptop Feet Pad Product name: Bottom Case screw + Screwdriver + Rubber Feet : For Pro 13inch A1278 / 15inch A1286 / 17inch A1297 Laptop Size: 13 inch / 15 inch / 17 inch Colour:black + silver Material:Rubber+Plastic+Metal Package Contents: 4 x rubber feet 1 set x screw 1 x screwdriver Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.