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 flow 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 resistance to aging and wear and tear. 4、Enhanced Performance: With this kit, you can bypass the problem area and maintain normal AC operation, 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. 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 1 x Rear AC Block Off Kit(4PCS)