Xlab speedchuck c02 inflatornow you can control the rate of co2 inflation for the lightest weight possible the new speed chuck weighs in at only 21 grams its designed for super fast inflation while allowing you to stop and continue inflation if needed an absolute must have for training and competition featurespush to inflatefast under 1 second inflationuses threaded cartridgespresta and schrader valvesmaterial anodized aluminumweight 21 gramswarranty because of our engineering and testin