1/2" diameter (13mm)

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12g Stainless Circular Barbell
12g Stainless Circular Barbell Circular Barbells 12g - 5/16" diameter (8mm) - 4mm balls Stainless Steel

12g Stainless Circular Barbell

5/16"-1"
$4.98
each
12g Stainless Captive Bead Ring
12g Stainless Captive Bead Ring Captive Bead Rings 12g - 5/16" diameter (8mm) - 4mm bead Stainless Steel

12g Stainless Captive Bead Ring

5/16"-1"
$3.98
each
12g Stainless Circular Barbell (internal)
12g Stainless Circular Barbell (internal) Circular Barbells 12g - 5/16" diameter (8mm) - 4mm balls Stainless Steel

12g Stainless Circular Barbell (internal)

5/16"-1/2"
$6.98
each
12g Titanium Captive Bead Ring by Anatometal
10g Titanium Captive Bead Ring by Anatometal Captive Bead Rings 10g - 5/16" diameter (8.0mm) - 7/32" bead High Polish (silver)

12g Titanium Captive Bead Ring by Anatometal

5/16"-1"
From $13.60
each
12g Titanium Circular Barbell by Anatometal
0g Titanium Circular Barbell by Anatometal Circular Barbells 0g - 1/2" diameter (12.7mm) Barbell Only (no balls)

12g Titanium Circular Barbell by Anatometal

5/16"-1"
From $20.96
each