Radiator Type: Anti-slip design, useful and practical.How to Use:Remove the bottom case and wipe the dropped with a dry cloth to wipe off the dust, but do not get wet.Heat the dropped with a hair dryer, when it hotted, stick on the rubber foot directly.Press until it is cooling, then turn over the bottom case, toast the cylinder with a lighter, after it dissolves, press it quickly to let it stuck in the bottom case.Shape: RoundCompatible Model: for Pro A1278 A1286 A1297 13 inch 15 inch 17 inchFeatures: Useful, Unibody Bottom Case, Non-slip MatColor: BlackMaterial: Rubbersize: 2 x 2cmPackage Contents:12 x Foot Pad for (Laptop Not Included) , , or iPad are registered trademarks of , Inc. Products are compatible and not endorsed by , Inc.Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.