3/8" diameter (10mm)

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16g Bioflex Circular Barbell
16g Bioflex Circular Barbell Circular Barbells 16g - 5/16" diameter (8mm) - 3mm balls Black

16g Bioflex Circular Barbell

5/16"-15/32"
 7 colors
$2.98
each
14g Bioflex Circular Barbell
14g Bioflex Circular Barbell Circular Barbells 14g - 5/16" diameter (8mm) - 4mm balls Black

14g Bioflex Circular Barbell

5/16"-15/32"
 7 colors
$2.98
each