This plate will NOT work with the Bowflex SelectTech 552 series 2. The difference between the two is the series 1 have a gray tab and the series 2 have a red tab. This is the #4 weight/plate and has a weight of about 7.5 lbs.
Nautilus Bowflex SERIES 1 SelectTech 552 Dumbbells Replacement Handle Tab Part
Bowflex SERIES 1 SelectTech 552 Dumbbells Replacement Weight Plate #5 (7.8 lb)
Bowflex SERIES 1 SelectTech 552 Dumbbells Replacement Weight Plate #5
