1) No effect to your Macbook and easy installation.
<br />2) Protect your laptop against dust and moisture.
<br />3) Material: The case is plastic hard case
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<br />About Macbook Model Number:
<br />
<br />A.Pro 13 A1278 Have CDROM
<br />B.Retina Pro 13 NO CDROM
<br />
<br />C.Air 13 inch
<br />D.Air 11 inch
<br />
<br />E. Pro 15 A1286 (Have CD-ROM)   
<br />F. Retina Pro 15 NO CDROM
<br />
<br />G.Macbook 12 inch
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<br />Please kindly check the model of your Macbook before purchasing!
<br />
<br />Package include:
<br />1 x hard case(top and bottom)