Tunze transformer

so if mine read 7210.20, what does that mean? I am thinking of the little black device, that is round that you plug into the wall?

my powerheads say 6100's on them, but i am starting to belive i bought two 6000's? I know the actual pump housing is the same from 6000 to 6100. But my transformers read 7210.20


let me know, thanks
 
It means you have a 6000, both pumps use motor block 6100.10, the only difference is the transformer.
 
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