Quadrangle Steel Captive Bead Ring — 12g–00g — Price Per 1

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SKU UR235-UR241
Weight 0.109800
Brand Painful Pleasures
Material 316L ASTM F-138 Implant Grade Stainless Steel

Quadrangle Stainless Steel Captive Bead Ring — Sizes 12g up to 00g

This stainless steel quadrangle captive bead ring is a versatile accessory that can be worn in a variety of piercings, including ear, lip, nipple, and genital. The jewelry is made of stainless steel and comes in sizes 12g up to 00g. It also comes in your choice of a 1/2” or 5/8” diameter depending on your selected gauge.


  • Material: 316LVM ASTM F-138 Stainless Steel
  • Gauge: 12g–00g (~2mm–10mm)
  • Diameter: 13mm (1/2”) or 16mm (5/8") (depending on gauge)
  • Ball Size: 6mm–12mm (1/4"–15/32”)
  • Price per one captive ring
SKU Gauge Diameter Ball Size
UR235 2mm ~ 12g 13mm ~ 1/2" 6mm ~ 1/4"
UR235 2mm ~ 12g 16mm ~ 5/8" 6mm ~ 1/4"
UR236 3mm ~ 8g 13mm ~ 1/2" 6mm ~ 1/4"
UR236 3mm ~ 8g 16mm ~ 5/8" 6mm ~ 1/4"
UR237 4mm ~ 6g 16mm ~ 5/8" 8mm ~ 5/16"
UR238 5mm ~ 4g 16mm ~ 5/8" 8mm ~ 5/16"
UR239 6mm ~ 2g 16mm ~ 5/8" 10mm ~ 3/8"
UR240 6mm ~ 2g 16mm ~ 5/8" 12mm ~ 15/32"
UR241 10mm ~ 00g 16mm ~ 5/8" 12mm ~ 15/32"
Size Table

Standard Body Jewelry Measurements

The following webchart is a quick reference guide for standard body jewelry measurements and how to measure basic body jewelry. Please print this webchart to help measure your body jewelry accurately.

Size Reference Chart

Visit our PainfulPleasures Infocenter for additional body jewelry information. There, you will find detailed articles on standard body jewelry sizes, how to measure body jewelry, basic body jewelry, and more.

Standard Body Jewelry Threading

Ensure compatibility between standard (non-custom) PainfulPleasures body jewelry parts using the tables below. More information on threading, including custom thread patterns, can be found in our Threading Infocenter article.

Internally threaded jewelry has a threaded post on the top and/or end, which is then inserted into a threaded hole in the barbell shaft.

Internal Thread Patterns by Gauge


18g, 16g

14g, 12g


Internal Thread Pattern

0.8mm or 0.9mm



Externally threaded jewelry has a threaded post on the barbell shaft, which is then inserted into a threaded hole in the top and/or end.

External Thread Patterns by Gauge


18g, 16g

14g, 12g, 10g

External Thread Pattern



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