From Stockroom:

The Seven Gates of Hell, named in keeping with long standing tradition, is used for male constraint and adornment.

It consists of a series of nickel-plated steel rings connected by a leather strap. The first, largest ring goes over the cock and balls, and the cock alone goes into the other rings.

The rings get progressively smaller, confining the penis. On this 7-Ring version, the first ring is 2″ in diameter. The second and third rings are 1 ¾”, the next three are 1 ½”, and the last one is 1 ¼”. The entire length is about 4″.

Also Available: The 5 Gates to Hell. This 5 ring version starts with a 1 ¾” ring, followed by two 1 ½” rings and two 1 ¼” rings. The entire length is about 3″.