The Stans Tubeless Sealant Injector (150ml) lets you quickly and cleanly inject sealant into Presta or Schrader valves for hassle-free tubeless setup. This Stans injector is ideal for mountain, gravel, and road bike tyres, thanks to its press-on adapter that fits Presta and Schrader valves, and drip-free top-fill system for precise, mess-free use. Perfect for tubeless setups and puncture repair. Buy your bike puncture repair at Halfords, the UK's largest bike accessories retailer.