I found this one on ebay, its my favorite chastity cage right now. It holds together real tight, but its comfortable, breathable, and light weight. At first time it was difficult to get the tube to close on the ring, its now a combination of it being used enough its goes together better and practice with it. Its just like the htv3/4 in that it comes with 4 ring an internal lock, and is offered in different lengths. I have a pic of it in my profile, and my profile pic is a white version of the same cage. Right now I would recommend this over any other cage