This page is on construction and will be updated soon....
can be used in this head for example
Fitting 2x male 9/16
Inside a Kiss Jet (down side) and a filter (on outer side)
see the details here for that speicial fitting
of course the hex head has an o-ring sealing
Price shown is for the metal firring (not the head) and is including nut, disk, orifice (0,0030 or 0.0025) and filter, o-rings