Portable Co2 Bicycle Tire Inflator - Fits Presta and Schrader Valves Without Adaptors Genuine Quality SportsnAir! Fits Both Presta And Schrader Valves Without The Need For Adaptors! Bonus! Two Co2 Threaded Cartridges Included! Adjusting Valve to Precisely Inflate Tires Without Over Inflation! Light Weight - 26 Grams, Less Than An Ounce!