The DART Refill includes six DARTs to refill the Stan's DART Tool or Incredible DART Tool, packaged in a resealable and biodegradable package. By using a flexible, laser-cut material, the DART conforms to nonuniform puncture shapes caused by the jagged and sharp edges of debris and obstacles found on trails, roads, and paths. Treated with a reactive solution, the DART bonds with liquid sealant on the inside of a tubeless tire to form both a chemical and mechanical seal to permanently bond a puncture too large for tubeless sealant to repair on its own. For best results, DARTs should remain well-sealed in packaging to maintain hydration of DART treatment.Includes six DARTs in resealable, biodegradable packageRepairs punctures and slices too large for sealant alone to sealReacts with Stan s Original and Race Day sealantsWoven, laser-cut material easily conforms to nonuniform punctures shapesExcess material wears off without trimming and does not affect ride quality Stan's No Tubes Dart Tubeless Repair Refills Tubeless Patch Kit UPC: 847746067061