The Stans NoTubes DART Refill Kit is ideal for topping up the tubeless repair plugs in your DART Tool. The Refill Kit contains 5 DART plugs to help keep you on the trail by sealing the biggest punctures and slices that the sealant can't handle on its own. More than just a physical plug, the DART creates a chemical reaction with Stan's sealant to provide a permanent airtight bond instantly. The material of the DART is also more flexible than other plugs on the market, with its laser-cut shape optimised to contour to the shape of different punctures, maximising surface area to increase the sealing reaction, fixing bigger punctures quicker. If you need to top up your DART Tool, you need the Refill Kit!Includes 5 DART Refills (required DART Tool not included)Reacts with Stan s sealant to form an instant, airtight sealNew woven, laser-cut material will not fray or pull out when ridingNew sonically welded reinforced plastic tip for added strengthWears off clean, no trimming needed, and can n