Gear Main Shaft 5600 SE Downflow 25005-10 ( 42933 )NOTE: This is USED WITH the GREEN end cap top
( not white, black, or gray ).
That is how you would know it is for the Down Flow electronic Fleck Valve ( 5600SE,SXT, 6600, or 6700 Down Flow Versions ).
If your Main Piston End Plug is not GREEN then you have the UPFLOW version.
Do NOT order this part for UPFLOW version ( gear would be WHITE ),
reference = GEAR_MAIN_DRIVE_UPFLOW_ET_SE_PN 24958_10
Some older models Fleck 5600SE may require you use a longer screw with the newer molding of this part ( now PN 42933 )