Features and Benefits: Improves Fuel EconomyIncrease Tire Life; Reduces vehicle vibrations; Extra Large tempered glass beads ; 2.5-3mm bead size ; Lifetime tire balance ; Balances complete rotating axle end on the fly ; TPMS compatible ; Manufactured with the highest quality and reliable materials. ; No need for a special valve core; No dust or contaminants like competing products;ECO XL is a large balancing bead solution (2.5-3mm) designed for use with extreme condition vehicles and tires, but compatible with all applications. XL will continuously adjust its balance position as needed on the fly ensuring you receive the best possible tire and complete wheel assembly balance. Made with the highest quality materials and manufacturing processes, ECO XL is the superior large balancing bead on that market today. Guaranteed. To determine the amount of ECO XL beads used in a tire, refer to the application chart. Easy to install, just drop in bag or pour in scoop when tire is broken down.