Stan’s Dart ToolThe Stan’s Dart Tool is the next evolution in tubeless puncture sealing technology. This ultra lightweight tool reacts with Stan’s sealant to instantly form airtight seals. The Barbed Plastic Tip anchors holds onto the tire so you can continue riding with confidence. Comes with a built in Valve Core Remover. Comes with two preloaded DARTS to keep you moving in the event of a large puncture. The clear cap unthreads and keeps your darts clean and ready to use. Very simple to refill.847746052654