Build Your Own KINK3D Viper Chastity Kit

Please note that if you want a base ring you MUST specify the style and size as all components are separate!

Introducing Viper
In 2019, KINK3D launched Cobra, never dreaming the effect it would have on the chastity landscape. After five years passionately refining and building out the Cobra ecosystem, we're ready to expand our cage lineup with a new style and a new name: KINK3D Viper®.

What's new?
• New enclosed design. Fully closed underside and shielded head. All while retaining longitudinal slits for ventilation and easy cleaning.

• New geometry with consistent inner diameter. The width on Viper stays (almost) uniform throughout the length of the cage.

• New visual style marrying armoured protection with sweeping curves.

What's the same?
• Compatible with all existing KINK3D base rings.

• Production technology: Viper uses the same 3D-printed PA12 nylon and industry-leading vapor sealing as our black Cobra cages.

• Sizes: Viper will launch with the same length and width lineup as Cobra, except without a Baby Viper length. That means 17 total cage sizes will be available out the gate.

• Like every Cobra cage we've ever sold, Viper is proudly made in the USA.

Coming from Cobra? Read this first!
Viper features a new shape with a more consistent inner diameter than Cobra. Viper doesn't have the wide entrance, narrow "neck", and flared head of most Cobra sizes. This means, in general, Viper has more space in the middle area of the cage, and less space in the head.

As a result, Viper can work a bit differently from Cobra. Viper isn't designed to lock the head of the penis in place. Rather, it is normal with Viper for the head of the penis to rest partly inside and partly outside the head section of the cage. The penis will often be able to slide back and forth more easily.

For fans of our Wide versions, please note that Viper cages in Wide maintain their extra width for the entire length of the cage. This means they are truly large — especially in the R length and above. It may be helpful to compare the specifications for Viper and Cobra to get a better sense for what size will serve you best.

Sizing Overview
When measuring flaccid length, allow the penis to hang naturally. Measure along the top side of the penis from base (where it meets the body) to tip.

It's best to use a ruler, a cloth tape measure, or a string (which you can then measure).

We suggest measuring several times over the course of the day under "normal" conditions — not right after a hot shower, and not when it's extremely cold. The goal is to find your typical smallest flaccid length, rather than the absolute smallest you ever get.

The advice on this page is a best guess, but everyone's anatomy is different. It is not a guarantee.

Length Advice
In our experience, customers are happiest when their Viper cage is a good match for their flaccid length. If the cage is too short, it can hang off the body and only partially cover the shaft. If the cage is too long, the head of the penis may not sit in the head section of the cage.

Getting a new chastity cage can be exciting, and we're all about that! However, please make sure you aren't partially aroused when you take your measurements. You don't want to overestimate your true size.

If you're on the border between two sizes, in our experience, most people prefer going with the shorter size.

Width Advice
We've found that the Standard width works well for most people. If you have a thinner-than-average penis or have found that other chastity devices have been loose on you, a Narrow width might be a good choice. On the other hand, if you have a thick penis or have had trouble fitting into other devices, the Wide option is probably better to consider.