Upgrade your Morse Twin SR or Teleflex CH 5600 controls with the Standard Control Arm. Made of durable 316 cast stainless steel, this threaded arm requires knobs (sold separately) for a secure and comfortable grip. Specifications . Material: 316 Cast Stainless Steel. Compatibility: Morse Twin SR and Teleflex CH 5600 Controls Features . Upgrade for Morse Twin SR and Teleflex CH 5600 Controls. Threaded Top for Easy Knob Installation. Requires Knobs (Sold Separately)