Stainless steel quick disconnects(QD) are designed for higher pressure than us car guys will be using, but will hold up much better to corrosion.  Also, it looks much better and really doesn't cost much more.

• Inlet = 1/4" Male Plug for (Quick Disconnect) QD:  This 1/4" male plug inserts into a female QD coupler.
• Outlet = 1/4" (National Pipe Thread) NPT Female:  This 1/4" female threaded end screws into a male 1/4" connection.

Connection Flow:

Mosmatic Spray Gun Outlet -> 1/4" Male QD Coupler -> 1/4" Female Plug -> Mosmatic 20" Lance Inlet 

*Think... Water Coming In to Water Going Out

Warranty Information:
MTM offers a 60 day warranty for any possible defects with their products. Info about their warranty can be found Here.