Product Description Replacement clamp for WCS Single-Bolt carbon seatposts. Compatibility:Ritchey Carbon posts with 1-bolt clampsSuitable for aluminium and carbon saddle railsModels:7x7: For standard saddle rails 7 x 7 mm in diameter (standard saddles)Colour: silverManufacturer Number: 41-260-817 7x9.6: For oval saddle rails 7 x 9.6 mm in diameter (Fizik carbon saddles, e.g. Antares/Arione; tune Speedneedle;/Komm-Vor, Selle Italia Turbomatic/SLR kit Carbonio)Colour: blackManufacturer Number: 41-260-812 8x8.5: For saddle rails 8 x 8.5 mm in diameter (older Selle Italia standard)Colour: blackManufacturer Number: 41-260-814Contents:1 x Ritchey WCS 1-bolt Carbon replacement clamp Manufacturer: Ritchey Design Inc. 575 Old County Road San Carlos CA 94070 USA info@ritcheylogic.com Distributor: Cosmic Sports GmbH Leyher Straße 47 90763 Fürth Germany info@cosmicsports.de