The magnetic vent cover has a wide range of application. It can be used to block off unused floor or side wall vents and registers(not for ceiling vents), change airflow direction, giving you a good solution for maintaining a comfortable environment while improving energy efficiency in your home. In addition, it can be attached to your cars for business advertising, covering company logo and prevent car doors from scratches and dents. Good choice for indoor, outdoor, HVAC, fireplace, refrigerator, and recreational vehicle use. Specification Color: Silver Material: Magnetic Rubber Size: 100cmx25cmx0.8cm / 39.4"x9.8"x0.3" Packing List: 1 x magnetic vent cover Advantages Crafted with a thick and durable material, these register vent covers provide excellent insulation and help regulate airflow. Their magnetic properties ensure a secure fit, preventing any unwanted cold/hot air movement during summer or winter. Instruction Installing these vent covers is a breeze! Simply cut them to your desired size using scissors or a utility cut tool, and place them over the desired vent. Notice The magnetic vent covers are only suitable for metal vents, not for plastic, aluminum or wood vents, please check your vent carefully before purchasing. Please be noted that these vent covers are not designed for ceiling vents, it can be used on floor or side wall vents/registers only.