This is a Midwest Steering steering valve coupled with a column adapter to allow replacement of the Parker/TRW/Ross Hydraguide units listed below. The HGA08W is identical hydraulically to the Hydraguide it replaces, it comes with a one year unlimited hour usage warranty.
As you can see in the comparison photos, the shaft extension and mounting bolt hole size and locations are the same as the original Hydraguide. Physically it is the same or slightly smaller. The ports are the same size as original but they are in somewhat different locations, so your supply lines may need to be moved or bent a bit to accommodate the new position. We highly recommend checking your installation and comparing to the photo that shows the porting arrangement so you will know what is involved.