* NL series quick coupling
     - Material: steel, brass or stainless steel.
     - low pressure
     - single valve type
     - Both the socket and plug are available with male screw connection, female screw connection, hose connection, or PU hose.

* One hand quick coupling (YNL series)
     - Material: steel, brass or stainless steel.
     - The features are the same with NL type quick couplings.
     - You could connect the socket and plug by on e hand, and it is more convience than NL type quick coupling.

* KS series quick coupling
     - Material: SUS304 / Brass
     - for middle & low pressure
     - twin valve type

* Camlock quick coupling
     - Material: SUS316 / SUS304 / Aluminum
     - Pay less to enhance more safety