[THICKEN SOLID METAL ROLLER]Made with high-quality metal wheels, riveted steel roller brackets and built-in steel bearings for easy and quiet rolling applications. The thickened and sturdy design makes it easier to achieve a perfect fit on all contact surfaces during use, as well as complete tire and tube patch adhesion during maintenance. Metal spinners work much more efficiently than plastic, wooden and polyurethane rollers. [2 Rollers Meet Different Needs]This car roller is specially used for various types of soundproofing mats. Perfect for installing automotive insulation on your entire vehicle. Wide rollers are Perfect for large flat areas, while narrow rollers are Perfect for tight areas and corners. When installing car insulation, it is enough to get these 2 rollers. [Raised Corrugated Design]The silencer roller adopts raised corrugated design to provide optimal adhesion. It has a corrugated profile that helps with better handling and prevents barrel slippage. The rollers move easily over the surface and press the insulation material to the surface of the car. [Multi-Purpose]This noise-cancelling roller is specially used for all types of sound isolation pads, audio sound isolation and damping. Also Perfect for installing car insulation throughout the vehicle, as well as being the perfect carpet roller, seam roller, wallpaper roller, tape roller and adhesive roller. Colour:black+silver Material:Metal+Plastic Size:6mm/40mm Package Contents: 2 x auto wheel roller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.