Single shut off couplings are typically designed for compressed air; air powered had tools, shop air application, water, liquid, steam, gas and other general industrial applications. Single shut off coupling are offered by our company for connecting pneumatic lines. They are provided with a self sealing valve in coupler which gives leakage free connection. They are available in different sizes ranging 1/8 to 1 1/2. Attributes of the industry manufactured single shut off couplings are: provides instantaneous connection disconnection of pneumatic lines. It is ideal for pneumatic screw drivers, nut runners and blow guns. It is highly durable and efficient. They are useful for various fluid flow regulations. Applications: pneumatic tools, on compressed air pipeline, air pressure equipments, oil, and water. Single shut-off couplings are recommended for use on fluid systems requiring the self-sealing valving on one side of connections only. The single shut-off couplings mate with standard fluid fitting ends and other precision aerospace fittings. These couplings are available in lightweight aluminum for low pressure applications and cres or titanium for high pressure applications. Single shut-off couplings are recommended for use on fluid systems requiring the self-sealing valving on one side of connections only. The single shut-off couplings mate with standard fluid fitting ends and other precision aerospace fittings.