This is a New Aftermarket Western Angling cylinder this one came on the old conventional mounts. There was more than one option through the years so make sure it is the correct one we have others if it is not. The Western part # is 25209 and the aftermarket # is 1304200.
This has 1" pin holes (not 3/4)
The cylinder is a 1.5"x10". The 10" is the movement of the cylinder
In the closed position it measures 17" from center to center on the hole.
From end to end the tank including the nut is 16.5"
This has the normal 1/4" pipe thread hole for a hose.