This is a car heater replacement kit, including heater duct , air vent outlet and hose, the complete parts can meet your installation needs. It has reasonable design, practical functions, and can be well applied to 4 holes air heater. Simple structure and excellent craftsmanship make it easy to use and have excellent durability, will provide you with good service. Features -Color: Black. -Material: Aluminum foil, plastic. -Size: About 80.00X4.20X4.20cm/31.44X1.65X1.65in. - inner diameter: 42mm/1.65in. -Tube before stretching: 32cm/12.59in. -Tube after stretching: 80cm/31.49in. -Vent Size: 77mm/3.03inx6 2mm/2.44in. -Outer vent diameter: 42mm/1.65in. - Warm air outlet can prevent the surface of car air vent from scratches, dust, etc. - The heater duct is light and flexible, convenient and practical, it will be your . - It has and durability. Easy installation, you can install it quickly without taking too much time. - Flexible and easy to install, it will slide right on your duct fan, vent exhaust, or light reflector. - The air outlet vent is made of plastic material, has good durability and practicality, corrosion proof. Package list: 4 x heater duct 4 x air vent outlets 8 x hose clips