One end is a cam and groove adapter, the other is a tank truck flange. That is the whole idea, and it saves a coupling and a gasket on every connection.
Size: 3"
Material: aluminum
Connection: cam and groove adapter x tank truck flange
Cast, machined and assembled in the USA
Assembled with solid pins
Complies with Commercial Item Description A-A-59326D for quick disconnect couplings
Not rated for compressed gas service, including air and steam