Topology Square Chastity Cage - Medium Size | F318A

The Topology Square Chastity Cage is made to break away from soft, round designs. Built from solid 304 stainless steel, it has a cool metal feel and a bold square shape that looks strong and confident. The clean lines and hollow square body give it a sharp, modern style that stands out right away.

This cage follows the natural curve of the penis, helping it sit in a calm, relaxed position. It holds gently but firmly, blocking erections without harsh pressure. On the back, a square panel introduces a striking visual contrast—adding a sense of structure, tension, and graphic novelty that sets this design apart from traditional forms.

The front opening is enlarged, making urination easier and cleaner during daily wear. The open structure also helps with airflow, keeping things more comfortable over long periods.

To fit different bodies and needs, the cage is available in three sizes: Small, Medium, Large

Multiple ring options are available, including round and curved styles. Wearable ring versions can be paired with an optional belt for added support, helping reduce movement and skin friction during long-term wear.

Topology Square is for those who love strong geometry, clear structure, and steady control. It’s simple, solid, and built for discipline with style.

• Cage Model: F318A
• Size: Medium 
• Weight: 135g
• Total Length: 1.96 inch / 50 mm
• Cage Length: 1.22 inch/ 31 mm
• Cage Diameter: 1.25 inch / 32 mm
• Material: 304 grade Stainless Steel
• Horizontal inner diameter of the urination hole: 0.35 inch/ 9mm
• Vertical inner diameter of the urination hole: 0.62 inch/ 16mm

STANDARD RING MODEL

• Round Ring: K01
• Curved Ring: K02

WEARABLE RING MODEL

• Round Ring: K03
• Curved Ring: K04A

BASE RING DIAMETER- [OPTIONAL]：

• 1.57 inch / 40 mm
• 1.77 inch / 45 mm
• 1.90 inch / 50 mm 
• 2.17 inch / 55 mm

SUPPORT BELT ACCESSORY- [OPTIONAL]：

• Name: PU Support Belt
• Model: PU1
• Material: PU
• Intro: Suitable for waist circumference 61cm to 106cm [24 inch to 41.7inch], can be customized to adjust the tightness.
• Compatible with all FRRK Chastity Cages

• 1 Ring
• 1 Cage
• 1 Metal Padlock with 2 Keys

ADD SUPPORT BELT | OPTIONS

• 1 Ring
• 1 Cage
• 1 Support Belt
• 1 Metal Padlock with 2 Keys

*Your privacy is of our utmost importance. All of our items get shipped out VERY DISCREET. With no weird markings on the packaging of any kind. It will be your little naughty secret and no one will ever know what's inside.