KINK3D Cobra and Viper chastity cages and Shaft Rings come with custom-produced silicone O-rings. They're designed to tighten the connection (if needed) and minimize the chance for pinching.
They're also small! If you frequently take your device off and put it back on, they may get lost in the nooks and crannies of your home.
If you need more, this pack is here to replenish your supply. It includes 20 O-rings in black or clear silicone — enough to last a long time and even share with friends.
