Rtint Window Tint Kit for Kia Optima 2011-2015 - Back Kit - 35% Back Door pre-cut window tint kit (back door and back port windows) for your vehicle made by Rtint. 5 year warranty backed film designed for DIY installationBack Step by step video installation application guide online. Installation support provided. No installation tools are included, but are recommended for professional installation results. Not a roll of tint film, this is a precut specific kit for your vehicle manufactured for you at the time of your order.