The Dual Action Repair for Tubeless (Dart) system offers a better way to repair damaged tubeless tyres. Specially treated darts not only clog large discs and holes in your tires, they also react with Stan's sealant to form a durable, airtight connection. This refill kit contains five darts and a carrier that makes reloading your darting tool quick and easy, all in a compact, sealed container. Details: Contains 5 dart refills (required dart tool not included); Reacts with Stan's sealant to form an instant, airtight seal; Barbed plastic tip anchors in the tire and does not pull out while driving; Flexible fabric conforms to the shape of the puncture and bonds to the sealant; Wears cleanly, requires no trimming and cannot be felt while driving, even with street tires.