3/8" diameter (10mm) > 15/32" diameter (12mm)

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14g Stainless Spiral Barbell (external, no ends) 2-PACK
14g Stainless Spiral Barbell (external, no ends) 2-PACK External Barbells 14g - 5/16" diameter (8mm) Stainless Steel

14g Stainless Spiral Barbell (external, no ends) 2-PACK

SPS-1408BB*
5/16"-15/32"
$3.98
pack
2g Gold Circular Barbell
2g Gold Circular Barbell Circular Barbells 2 gauge - 15/32" diameter - 10mm balls Gold Stainless

2g Gold Circular Barbell

CRP-21210
15/32"
$10.98
each