Follow these steps to find out what model of Apple notebook you have and what corresponding FIN model you should order.
On your notebook, go under the Apple menu and select "About This Mac". Click on the "More Info..." at the bottom of the window.
A "Hardware Overview" window should now appear. The second item will be a "Model Identifier:"
Look in the list below to find your Apple notebook model and then click on the link for the FIN model you need to order.

Model Name Description Machine ID FIN Model
MacBook 13-inch, plastic MacBook1,1 The FIN for MacBook
MacBook 13-inch, plastic Late 2006 MacBook2,1 The FIN for MacBook
MacBook 13-inch, plastic Mid 2007 MacBook2,1 The FIN for MacBook
MacBook 13-inch, plastic Late 2007 MacBook3,1 The FIN for MacBook
MacBook 13-inch, plastic Early 2008 MacBook4,1 The FIN for MacBook
MacBook 13-inch, plastic Late 2008 MacBook4,1 The FIN for MacBook
MacBook 13-inch, aluminum Late 2008 Unibody MacBook5,1 The FIN for MacBook/MacBook Pro 13" Unibody
MacBook 13-inch, plastic Early 2009 MacBook5,2 The FIN for MacBook
MacBook 13-inch, plastic Mid 2009 MacBook5,2 The FIN for MacBook
MacBook 13-inch, plastic Late 2009 Unibody MacBook6,1 The FIN for MacBook White 13" Unibody
Aluminum Non-Unibody      
MacBook Pro 15-inch aluminum MacBook Pro1,1 The FIN for MacBook Pro 15"
MacBook Pro 17-inch aluminum MacBook Pro1,2 The FIN for MacBook Pro 17"
MacBook Pro 15-inch aluminum, Glossy MacBook Pro1,1 The FIN for MacBook Pro 15"
MacBook Pro 15-inch aluminum, Core 2 Duo MacBook Pro2,2 The FIN for MacBook Pro 15"
MacBook Pro 17-inch aluminum, Core 2 Duo MacBook Pro2,1 The FIN for MacBook Pro 17"
MacBook Pro 15-inch aluminum, Mid/Late 2007, 2.4/2.2 GHz MacBook Pro3,1 The FIN for MacBook Pro 15"
MacBook Pro 17-inch aluminum, Mid/Late 2007, 2.4 GHz MacBook Pro3,1 The FIN for MacBook Pro 17"
MacBook Pro 15-inch aluminum, Early 2008 MacBook Pro4,1 The FIN for MacBook Pro 15"
MacBook Pro 17-inch aluminum, Early 2008 MacBook Pro4,1 The FIN for MacBook Pro 17"
MacBook Pro 17-inch aluminum, Late 2008 MacBook Pro4,1 The FIN for MacBook Pro 17"
Aluminum Unibody      
MacBook Pro 13-inch Mid 2009 Unibody MacBook Pro5,5 The FIN for MacBook/MacBook Pro 13" Unibody
MacBook Pro 13-inch Mid 2010 Unibody MacBook Pro7,1 The FIN for MacBook/MacBook Pro 13" Unibody
MacBook Pro 13-inch Early 2011 Unibody MacBook Pro8,1 The FIN for MacBook/MacBook Pro 13" Unibody
MacBook Pro 15-inch Late 2008 Unibody MacBook Pro5,1 The FIN for MacBook Pro 15" Unibody
MacBook Pro 15-inch 2.53 GHz Mid 2009 Unibody MacBook Pro5,4 The FIN for MacBook Pro 15" Unibody
MacBook Pro 15-inch Mid 2009 Unibody MacBook Pro5,3 The FIN for MacBook Pro 15" Unibody
MacBook Pro 15-inch Mid 2010 Unibody MacBook Pro6,2 The FIN for MacBook Pro 15" Unibody
MacBook Pro 15-inch Early 2011 Unibody MacBook Pro8,2 The FIN for MacBook Pro 15" Unibody
MacBook Pro 17-inch Early 2009 Unibody MacBook Pro5,2 The FIN for MacBook Pro 17" Unibody
MacBook Pro 17-inch Mid 2009 Unibody MacBook Pro5,2 The FIN for MacBook Pro 17" Unibody
MacBook Pro 17-inch Mid 2010 Unibody MacBook Pro6,1 The FIN for MacBook Pro 17" Unibody
MacBook Pro 17-inch Early 2011 Unibody MacBook Pro8,3 The FIN for MacBook Pro 17" Unibody