Creates a tough barrier between tire and tube to aid in preventing punctures from debris Universal size fits tires between 12` and 26` from 1.75` to 2.125` wide and 700c x 19-35mm Simply cut to fit smaller tires Sold as a set of two - enough for one bike 12 - 26` x 1.75 - 2.125` / 700x19-35 Pair