Happygo Male Chastity Device Hypoallergenic Stainless Steel Cock

Base ring size measurement and choose method
Take a inelastic line to surround the root of penis (the place is close to the belly, behind the scrotum), and then measure the length of the line, which is the perimeter, and the diameter equal to the length of Line divided by 3.14. Finally choose the base ring size near to the diameter.
Feature
With the Locking chastity device, it will be locked away until you decide to set them free.
The devious cage is the ergonomic design, both adjustable and lockable.
The hypoallergenic cage is sturdy, yet semi-flexible with an opening for urethral access and extended wear.
3 size for choose based on inner diameter of the clamp ring, suitable for most people.
Materials
Real stainless steel. No chrome plating and no nickel plating. Just hand-polished, more comfortable and completely body safe.
Size
3 size for choose based on inner diameter of the clamp ring
1.57 inch/ 4.0cm diameter
1.77 inch/ 4.5cm diameter
1.96 inch/ 5.0cm diameter
Cage
30mm inner diameter
45mm cage length

To avoid injury or aggravation of pre-existing conditions, this product should not be used on bruised, swollen, or inflamed areas including skin lacerations.
Discontinue use immediately if irritation or discomfort occurs.
Cleaning: Use a mild soap and soft type brush (toothbrush) for cleaning.