The Lenghtmaster videos by Superdick.
As mentioned by DLD, automotive / home depot has those black O-rings, even in big sets.
I'm waiting for my sleeves and I bet they are fantastic, from the MoS Shop.
Certainly suitable for many uses. Silicone as a cockring material overall is pretty much ideal. There are certain TPR-material rings which are OK, but so much low quality stuff is out there.
As mentioned by DLD, automotive / home depot has those black O-rings, even in big sets.
I'm waiting for my sleeves and I bet they are fantastic, from the MoS Shop.
Certainly suitable for many uses. Silicone as a cockring material overall is pretty much ideal. There are certain TPR-material rings which are OK, but so much low quality stuff is out there.