1/4" NPT Ball Valve Shut-off Non-Rust Zinc - Air, Water Easy-to-use ball valve for air or liquid flow control Oversize aluminum knob for fast and certain on/off Non-rusting die-cast zinc holds up to harsh conditions Stainless steel ball with nylon gasket for no-leak performance; 13/16" hex body 1/4" NPT male/female input/output for installation and mounting versatility; 1.6" length