This is a new Genuine Fisher Angling Cylinder used on the RD and HD blades. This is the older style with the pipe thread. If you have the O ring style, you need the 56603.
The Fisher part #'s are 20117K, 20117, 3660 or A3660.
This has 1" pin holes (not 3/4.) The cylinder is a 1.5"x12". The 12" is the movement of the cylinder. In the closed position, it measures 19.5" from center to center on the hole. From end to end, the tank including the nut is 18.75". The port for the hose is pipe thread.
