1/2" diameter (13mm) Highest Rated

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0g Titanium Circular Barbell by Anatometal
00g Titanium Circular Barbell by Anatometal Internal Barbells 00g - 9/16" diameter (14.3mm) Barbell Only (no balls)

0g Titanium Circular Barbell by Anatometal

AL-CRT013BB
1/2"-1"
from $111.60
each
Spiked Black Nipple Rounders
Spiked Black Nipple Rounders Nipple Shields 14g - 1/2" diameter (13mm) Black

Spiked Black Nipple Rounders

NP157
14g 1/2"
$17.98
pair
16g Titanium Captive Bead Ring by Anatometal
2g 13/16" Titanium Captive Bead Ring by Anatometal Captive Bead Rings 2g - 13/16" diameter (20.6mm) High Polish (silver)

16g Titanium Captive Bead Ring by Anatometal

AL-CBT1606
1/4"-1/2"
$10.84
each
Spiked Rainbow Nipple Rounders
Spiked Rainbow Nipple Rounders Nipple Shields 14g - 1/2" diameter (13mm) Rainbow Stainless

Spiked Rainbow Nipple Rounders

NP189
14g 1/2"
$17.98
pair
Stainless Steel Screw-On Ball Ring
Stainless Steel Screw-On Ball Ring Screw-Ball Rings 16 gauge - 1/4" diameter Stainless Steel

Stainless Steel Screw-On Ball Ring

BRS-16-1/4
16g or 14g
$2.98
each
12g Black Circular Barbell (internal)
12g Black Circular Barbell (internal) Circular Barbells 12g - 1/2" diameter (13mm) - 6mm balls Black Stainless

12g Black Circular Barbell (internal)

ICRB-12136
1/2"-5/8"
$8.98
each
Spiked Gold Nipple Rounders
Spiked Gold Nipple Rounders Nipple Shields 14g - 1/2" diameter (13mm) Gold Stainless

Spiked Gold Nipple Rounders

NP165
14g 1/2"
$17.98
pair
Spiked Rose Gold Nipple Rounders
Spiked Rose Gold Nipple Rounders Nipple Shields 14g - 1/2" diameter (13mm) Rose Gold Stainless

Spiked Rose Gold Nipple Rounders

NP181
14g 1/2"
$17.98
pair