TyreBeads Motorcycle Tire Balancing Beads Kit Includes 1 oz for front tire, 2 oz for back tire, valve core tool, and an applicator tube These are premium internal tire ceramic balancing beads. Reusable, super hard, durable, and eco-friendly - will not rust, clump, or melt Note: Depending on the size of your tires you may need a larger kit. These work with tube type tires WARNING: Please buy from "TyreBeads" as the seller. There are unscrupulous sellers on amazon selling fake kits; we can not guarantee the quality of these.