We all know that keeping it hard with the veins proudly protruding, especially while e-stimming creates wonderful sensations as the nerves on the head and under the head are tight and very sensative.  :)

So why not get it up and keep it up as long as possible with these new ergomonic silicone cock and ball rings?  

Although they are somewhat stretchy and soft like velvet to the touch, they will keep you package nice and firm for whatever you are doing.

Notice that the design of this ring set fits firmly around the cock with the back silicone ring slanted to go around the balls and keep them back out of the way, but nice and tight. As shown below, the unstretched opening for the cock is 1-3/8" with the ball bag unstretched is 1.65".  

Although they stretch out a bit, they are not your typical super-soft  stretchy silicone cock and ball rings.  They were made to be nice and tight when put in place.