The Primal:Spark is our slimmest ring and perfect for guys who want a stainless steel cock ring with a narrow profile and a striking look. This penis ring is cast in 100% stainless steel and then coated in a durable glossy black finish. The coating is body safe, and is used in body piercing jewelry. The inside is rounded for extreme comfort and a flattering fit. The Primal:Spark cock ring features our S-curve profile and keyhole shape, designed to fit a man's body and make your package look its biggest. Your bulge will get looks whether you wear this ring under shorts, a pair of jeans, or even a swimsuit. And when you're ready for action, the Primal:Spark cock ring can help keep you harder longer and delay climax so you and your partner can enjoy more intense orgasms. Product Details Width: 0.7 cm (~0.25 inches) Weight: ~55 grams (~2.0 ounces) varies slightly by size Sizes: Available in 4 standard diameters (40mm, 45mm, 50mm, 55mm) Cloth storage pouch included Notes: You may notice a hair-thin, slightly lighter-colored line on the inside of the ring at the bottom. This is where the ring was suspended during the coating process, and is not a defect.