TyreBeads Tire Balancing Beads - 4 bags of 6 oz (24 total) fits 4 tires + FREE Installation Kit. Includes 4 bags of 6 oz each (24 oz total) + FREE Installation / Applicator kit, FREE Filtered Cores, FREE Red caps These are premium internal tire ceramic balancing beads. Reusable, super hard, durable, and eco-friendly - will not rust, clump, or melt Pour them in during mounting or apply through the stem. Good rule of thumb is 1 oz per 10-12 lbs of tire To install these through the valve stem you can use the included 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.