Sonic Foam System - File Set - 6 Pieces - 1/3 (Small) wall mount upgrade kits You would use this to

You would use this to upgrade the outlet on any spray gun that uses 1/4" and is NPT (Like the MTM SG-28

Fits inside a standard decorator opening faceplate

LUX is the perfect choice for achieving a more upscale look

with the pad and soap already inside

If you want a complete sprayer/wand/foam cannon upgrade kit that includes this nozzle assembly

Sonic Foam System - File Set - 6 Pieces - 1/3 (Small) wall mount upgrade kits You would use this toThese are the tools I've decided to use at OGHQ, they have a nice quality to them with good ergonomics. They aren't intended to replace everything but there is a great variety of tools offered here. For the price, you cannot beat them vs something that's 2x or 3x the cost like Snap On.