The Silca Thread-On Schrader Chuck has a hose barb to attach to a bare Silca hose on one end and female Schrader threads on the other end. The chuck threads onto a Schrader valve or Silca's Stainless Presta chuck or CP1 Disc Adapter for a secure connection.
Nickel-plated brass construction. Hose barb fits all Silca hoses, old and new. Threads to Schrader valves and all Silca chucks with male Schrader threads.