Red Hat JDK 8 PrintFlagsFinal shows pd product for a variable

Issue

PrintFlagsFinal shows pd product for a flag on JDK:
$ java -XX:+PrintFlagsFinal -XX:TieredStopAtLevel=1 -version:

    uintx AdaptiveSizeDecrementScaleFactor          = 4                       {product}
    uintx AdaptiveSizeMajorGCDecayTimeScale         = 10                 {product}
...
     uintx CMSYoungGenPerWorker                      = 67108864            {pd product}
...
     intx CompileThreshold                          = 10000                               {pd product}