12mm Brass Hose Connector:
A plastic free, screw on hose connector with a locking claw which clamps down onto the hose to provide a secure, leak-proof connection. Made from durable, rust proof solid brass will withstand many years of use without deteriorating . 
Connects to standard clip on tap adaptors, garden sprayers and nozzles with a simple click.
Use with 12mm garden hose.