Master Series Scrotum Egg Shells with Spikes StainlessTest your masochistic edges with these scrotum CBT egg shells with spikes! The eggs are made entirely of stainless steel so they are durable, long lasting and easy to sanitize. The metal is also sensitive to temperature so you can heat or cool them for extra sensation! Each egg fits around the testicles and there is a spacer of 0. 36 inch width where the scrotal sac goes. The testicles go inside the eggs and then the device closes around the testes