The difference between the series is the Series 1 handle has the word Bowflex written on a gray piece and the Series 2 the word Bowflex is written on a red piece.
Bowflex 552 Series 2 Only Dumbbell SelectTech Replacement Dial Handle Part
Bowflex SelectTech 552 Series 2 Dumbbell Replacement Plate #2 002-2072 2.6 lbs
NEW Bowflex SelectTech 552 Series 2 Dumbbell Replacement Plate Weight 1 2 3 4 5
Bowflex SelectTech 552 Series 2 Dumbbell Replacement Plate Weight 1 2 3 4 5
