Two cock rings, one set, one differentiating feature: internal metal beads sealed inside smooth silicone that give each ring a weighted feel a standard ring cannot replicate. The weight comes from metal beads sealed inside the silicone, not from bulk or added hardware. The exterior stays smooth and the ring stays flexible enough to stretch over and fit securely. During wear the added weight creates the sensation of a heavier, fuller cock while the snug fit of the ring supports blood flow for harder, more sustained erections. The increased ligament resistance from weighted wear may also contribute to stronger erections over time with regular use. The red ring sits at a 1.1 inner diameter and the black at 1.2, enough of a difference to matter for fit. Wear them separately to find the right size or stack both for a more intense weighted effect. Latex-free and phthalate-free silicone and iron construction. Water-based lubricant only. Red Ring Measurements: Thickness: 0.5 (1.3 cm) Inner Diameter: 1.1 (2.8 cm) Outer Diameter: 1.9 (4.8 cm) Weight: 20g (0.71 oz) Black Ring Measurements: Thickness: 0.5 (1.3 cm) Inner Diameter: 1.2 (3 cm) Outer Diameter: 2 (5.1 cm) Weight: 20g (0.71 oz) Materials: Silicone and iron (phthalate-free, latex-free) Color: Multi: Black and Red Note: Use with water-based lubricant. Wash with warm water and toy cleaner after each use. Pat dry and store in a cool, dry location, away from direct sunlight and separated from other toys.