Nitrile Cock Ring Set is available in five colors: Black, Blue, Purple, Red and White Each sold separately. 3-pack of different sized rings. These amazingly durable cock rings are made of 100% skin-safe nitrile, the same material used in hospital gloves. Nitrile cock-rings are strong yet flexible, snapping back to shape after each use. Nitrile is a latex-free, strong and flexible material. Because it is latex-free, nitrile is a preferred cock ring material for men with rubber allergies. And not to worry, they are compatible with silicone & water-based lubes! Set includes 1.25 inches, 1.5 inches and 2 inches. Nitrile Cock Ring Black Set from Spartacus A Passion For Quality Catalog page 21. Made in the USA. New images added February 10, 2013. - old