Injector Screen and Cap with o-ring.
Used in older Autotrol Valve Models 155, 163, and 168.
OBSOLETE PART -
NONE remaining as of 07/17/2017
Very old versions ( 100B166-701 ) had a separate cap and metal screen.
Used in Autotrol models 150, 1550-TC, 155, 160, 163, 168.
Since these are GONE, you next best option ( if you have 155 valve body ) is to upgrade to the 255 Valve Body.
It comes with new plugs, and valve discs, and fits in place of older 155 ( 1550-TC ) Autotrol valves.
If you just need the o-ring for the cap, we have those, PN AP6F