I was skeptical about devices like this. Especially the ones with a suction cup for the head you have to attach beffore using this stretcher. This one comes with a thick silicone string that's inserted into a foam tube. This is the only part that you use to attach to the tool. It's a much more simpified version and a better one in my opinion. I actually prefer it with just the silicone string. It's about as thick as any c-ring you'll find on the markert. I've been wearing it for a few days now at an hour at a time. I hardly notice I'm wearing it. They say you can wear this outside, but only if you're wearing a very loose set of baggy pants with a long coat to cover.This came with 6 extra sections of extionsion screws of varrying lengths in pairs. It's recommended to use this in a flacid state but it's easily used after a round of pumping as long as you can fit it through the black base. This could be helpful to anyone trying to straighten out a curve. Overall great product. Great value for the price listed.