Product Description The retrofits frames that do not have cable stops with these and allows the external routing of shift and brake cables. Each Backstop cable guide has two cable stops, and is easy to mount on tubes of different frame diameters thanks to the foldable design. The Backstop cable guide is available in 28.6 mm (1 1/8" ), 31.8 mm (1 1/4" ), 34.9 mm (1 3/8" ) and 38.0 mm (1 1/2" ). Manufacturer Numbers:black 28.6 mm:BR5454black 31.8 mm:BR5455black 34.9 mm:BR5456black 38 mm:BR5457Contents:1 x Problem Solvers Backstop cable routing clamp Manufacturer: Problem Solvers 6400 W 105th St. Bloomington MN 55438 USA info@problemsolversbike.com Distributor: Cosmic Sports GmbH Leyher Straße 47 90763 Fürth Germany info@cosmicsports.de