Graduated two ounce injector makes application of sealant simple, with no mess or waste of sealant. Dual-threaded tip fits both presta (inner threads) and schrader (outer threads) valves. FEATURES: a Allows for easy transfer of sealant from one tire to another a Includes schrader valve core remover a Dual threaded plastic adapter fits both presta and schrader valves a Now with rubber seal for smoother operation