Don't tint the rear hatch glass, because as Jman said, you won't be able to see out at night. i had my front two windows to match the rest of them and it looks good, but not so dark that i can't see. I'm pretty sure it's 20 or 25%, whatever comes factory on the rear windows. 5% on the rear windows & cargo windows would be a good idea though. You can see the tint in my signature picture.