The Sentinel Series - Split Micro Chastity 

Micro Chastity. Ball-Splitting Precision. Tailored Control.

Meet The Sentinel Series — a trio of 3D-printed micro chastity cages engineered for serious keyholders and submissives who demand tailored restriction and full ball division. Each model delivers a unique level of exposure, airflow, and psychological intensity — while maintaining a snug, ergonomic grip.

Sentinel A – The Watcher

Open-bar design for those who crave visibility, vulnerability, and airflow. Lightweight, airy, and relentlessly exposing.

Sentinel B – The Keeper

Equipped with a mesh add-on for partial concealment while maintaining breathability. The perfect balance of tease and denial.

Sentinel C – The Warden

Near-total coverage with aeration holes. Maximum discretion, maximum confinement. A fortress you’ll feel — and never forget.

Sentinel D – The Inverter

The most extreme of the Sentinel Series, The Inverter flips chastity on its head—literally. Designed to push the shaft inward, this reversed micro-cage creates an intense, compact pressure that keeps him tucked, denied, and totally out of sight.

All models feature a built-in ball-splitting ring for intense separation, increased security, and that unmistakable locked-in feel.

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Made of Nylon material, this cage is one of the most comfortable and lightweight we ever made. This model offers sizes of options to choose from. Very solid and sturdy, suitable for long term chastity wear.It is 3D printed per order and delivered accordingly.

It includes one cage tube, 1 ring + 1 integrated lock ready to use.

SIZE CALCULATOR

HOW TO MEASURE

Measure for the base ring

Measure the circumference around your cock from behind the balls. You can use a fabric tape measure (the kind dressmakers use) to get the measurement, or, if you don’t have one, you can use a piece of string and a ruler. Wrap the tape measure or string around your cock, going behind the balls. The tape should be snug but not tight.

Now you have your circumference you need to divide it by 3.14 to get the diameter. We’ve done some sample calculations below to show you how it works:

In imperial:7 inches ÷ 3.14 = 2.25 inches diameter
6.25 inches ÷ 3.14 = 2 inches diameter
5.5 inches ÷ 3.14 = 1.75 inches diameter
4.7 inches ÷ 3.14 = 1.5 inches diameter

Measure for the Cage Tube

Ideally, you want a cage that is just long enough to allow the tip of your penis to come to rest at the end of the cage.

Take a ruler and place it on the underside of your flaccid penis, measuring from tip to base. Do not press the ruler into your scrotum, as this will give you an incorrect measurement. Just allow the ruler to make contact with the skin there. You should be completely flaccid when taking this measurement, but not the “retracted inside the body because it’s cold or scared” type of flaccid. For accurate results, take this measurement several times throughout the day, to find your most common length. When you have found your measurement, deduct a ¼ to a ½ inch off the final results and this will be your ideal length for a cage.

SIZES AND OPTIONS:

Rings sizes available:

• S = 45mm x 42mm / 1.77" x 1.65" 
• M = 50mm x 47m / 1.96" x 1.85"
• L = 54mm x 53mm / 2.12" x 2.08"

This item is made to order and 3D printed. Processing time might vary from 2 days to 8 days depending on orders volume.

HOW WE MAKE IT?