The Forto F-88 Silicone Double Cock and Balls Ring Glow in the Dark is a unique ring made of silky-smooth premium liquid silicone and is ergonomically shaped to stretch to 2x size. Ergonomically shaped to be worn on the penis and the testicles. Its flexible tip ensures a comfortable. snug fit. The best part? It glows in the dark! So whether you're looking to add a little visual stimulation or just want to spice things up with your partner. this ring is sure to please. Flexible tip for extra stimulation with a partner.