OEM Nautilus Bowflex 552 SERIES 1 Disc 5 SelectTech Dumbbell Replacement -NOT 3D
These parts 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 an original Nautilus /Bowflex part and not 3D printed.