We accidentally ordered several of these chastity devices awhile back and need to move them out of our inventory.  Our error is your gain.  This device has many round air-holes in it to make them breathable and comfortable.  

The device also comes with four sizes of diameters to give the wearer a nice fit around the base and balls.  See illustration below for specific diameters.  They also include a lock with two keys and four plastic locks that go into the small pin holding the cage to the device.

A non-erect penis length that will fit inside the 1-1/4" diameter device before locking it in is 4 Inches. A picture of the assembled device is also shown below.

At the tip is a nice size slit for urinating or inserting a urethral insert that you can electrify if you wish.

Get them while they last.