Superior Quality Materials: Our car seat gap filler is made of polyurethane material, which is both soft and tough, and can easily fit the seatbelt anchor points. This product has strong durability and a long service life, and can provide high-quality protection for your vehicle. It is indeed a practical and essential car accessory Upgraded Gap Filler: This car seat storage box can not only store mobile phones and small items, but also effectively prevent items from falling into the seat gaps. If you don't like the side with grooves, you can also flip it over to use the other side! The width of the phone slot is about 0.47 inches, which is suitable for most mobile phones with regular thin protective cases, and not applicable to extra-large sizes or thicker protective cases Installation Tips: Designed for your car seats (2-pack), the clip part on the product must securely fasten to the seat belt buckle. Otherwise, it may detach or fail to move with the seat. Buyers must follow the installation video for proper setup. Note: Product dimensions are manually measured and may have a tolerance of ±1~2 cm. Actual product dimensions may vary Efficient Use of Interior Space: The product is 15.74 inches long (approximately 40 cm. ), 1.29 inches thick (approximately 3.3 cm. ), and 1.14 inches wide at its narrowest point (approximately 2.9 cm. ). For optimal results, we recommend using it on seats with a gap width of 1.1-1.2 inches (approximately 2.8-3.0 cm. ). Please be sure to carefully measure the seat gap before purchasing to avoid issues where the product is too narrow or too wide Easy Installation: The installation process is extremely simple: ① Align the product buckle with the seatbelt anchor point; ② Press the buckle firmly until it is completely fixed (this step can prevent the product from sliding); ③ Insert the product into the gap of the seat to use it. Please note: Due to factors such as light and shooting angle, there may be a slight color difference between the product and the picture