The ItspleaZure Steel Birdcage Chastity Device could be exactly what you've been looking for.
The multiple ringed cages are designed to mirror the natural fall with enough space at the tip for some extra potential.
Perhaps attaching weights to the very top of the design so it pulls further down and into the shaft of your sub.
The back brace plate, behind the hooking ball separator, also helps to ensure that the more weight you add, the deeper the pinch to their testes.
Cage Length: 7 cm,
Total Length with Ring: 8 cm
Cage Internal Diameter: 3.5 cm
Hinged Ring Diameter: 4.5 cm
Included in the storage bag:
1 Steel cage
1 steel hinged ring
1 sliding lock with 2 keys
You may return most new, unopened items within 48 hours of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in India.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.