The black CB-X Large and X-Large U-Rings 2-Pack contains two replacement base rings for CB-X complete chastity kits: one Large ring with a 2⅛-inch inner diameter and one X-Large ring with a 2¼-inch inner diameter. The two sizes let an existing CB-X user compare the larger options sold beyond the five standard kit sizes.
Verified product details
| Brand | CB-X |
|---|---|
| Store / distributor SKU | CB5745 |
| Manufacturer variant SKU | URING-2PKBLK |
| Supplier-record UPC | 860007115745 |
| Color | Black |
| Contents | One Large U-ring and one X-Large U-ring |
| Large inner diameter | 2⅛ in / 54 mm |
| X-Large inner diameter | 2¼ in / 57.2 mm |
| Compatibility | CB-X complete chastity kits |
This listing is for the two U-rings only. A cage, base components, locking pins, spacers, lock, and keys are not included. The manufacturer’s exact two-pack page does not identify one exact polymer. CB-X’s broader U-ring information uses both polycarbonate and ABS descriptions, so this page does not repeat the older, more specific “medical-grade polycarbonate” claim.
Choose the ring by fit, not label alone
A U-ring forms the base of a compatible CB-X chastity assembly and sits behind and around the scrotum and the base of the penis. CB-X publishes the Large and X-Large measurements as inner diameters. Compare the two rings off body, begin with the roomier option, and follow the instructions supplied with the complete CB-X kit.
- The correct ring should sit securely without pain, numbness, skin discoloration, loss of blood flow, unusual swelling, concerning temperature change, or difficulty urinating.
- Do not assume either ring will fit every body. Do not force a smaller ring to achieve a tighter fit.
- Keep the complete device’s normal removal method and key immediately available before wear.
Assembly, inspection, and stopping boundaries
Use only the CB-X assembly sequence and matching components specified for the complete device. Before each use, inspect both U-rings for cracks, stress whitening, deformation, deep scratches, rough edges, or damaged connection points. Replace a damaged ring rather than gluing, heating, reshaping, sanding, or otherwise repairing it.
Remove the device promptly if you notice pain, numbness, skin discoloration, loss of blood flow, unusual swelling, concerning temperature change, urinary difficulty, or any fit that feels unsafe. Seek appropriate urgent help if the assembly cannot be removed safely or symptoms persist after removal.
Cleaning and storage
Follow the current care directions supplied with the complete CB-X device. The exact two-pack page does not publish a cleaner, water temperature, dishwasher, boiling, or chemical-sterilization method, so this page does not promise one. Clean the rings after use as directed, rinse away any permitted cleaner, and allow every surface and connection point to dry completely before storage.
Store the rings clean, dry, unlocked, and protected from direct heat, prolonged sunlight, and crushing or bending. Reinspect both pieces before the next assembly.
Browse the CB-X collection, compare the Chastity & Pup Play department, read the chastity-cage fit, materials, and safety guide, find the matching black CB-X locking-pin four-pack, check shipping and discreet packaging, or review the returns, refunds, and hygiene policy.
