Expert Shield *Lifetime Guarantee* &shy; THE Crystal Clear Screen Protector for: Apple iPhone 4 & 4S Your Expert Shield comes precut to the size of this screen. Your Expert Shield comes with a no bubble guarantee. Your Expert Shield also comes with a no scratch guarantee. Actually, your Expert Shield is pretty much guaranteed to make you happy (we guarantee it). Oh, and those guarantees last for the lifetime of your device. Because we love you.