1. Vehicle Compatibility: Compatible with for Navigator 1998‑2006, for Expedition 1997‑2006, please check carefully to make sure it is compatible with your vehicle. 2. Powerful Function: Prevents refrigerant to rear AC unit and only uses front AC unit, commonly used to bypass leaking rear lines and restore normal AC working from front unit. 3. High Durability: The rear AC block off kit offers excellent durability. It's made from rubber and aluminum, ensuring to aging and wear and tear. 4. Enhanced Performance: With this kit, you can bypass the problem area and maintain normal AC , guaranteeing reliable and consistent performance. 5. Simple Installation: Easy and quick to install, without complex and professional steps, directly replace the old parts, convenient for using, saving your time and effort. Spec: Item Type: Rear AC Block Off Kit Material: Rubber+Aluminum Description: Allows you to block off the refrigerant lines to the rear air conditioning unit and only use the front air conditioning unit. Fitment: Replacement for Navigator 1998-2006 Replacement for Expedition 1997-2006 PackageList: 1 x Rear AC Block Off Kit(4PCS)