Product Description The Mast Topper seatpost by Ritchey - for frames with integrated seatposts Ritchey's Mast Topper seatpost is used when you want to attach a saddle to a seatpost that is integrated into the frame. You can simply put the Mast Topper on your integrated seat post and fix it there with a bolt. Specifications:Application:RoadDiameter:30.25 mm, 34.9 mm, 38.35 mmLength:70 mmSetback:25 mm, 8 mmTechnical Information:Clamp:single boltCompatible Saddle Rails:7 x 7 mm (standard)Material:aluminiumColour Index:hp black:high-polished black = black-polishedManufacturer Numbers:30.25 mm / 70 mm / SB 25 mm:4105546700934.9 mm / 70 mm / SB 25 mm:4105546700738.35 mm / 70 mm / SB 8 mm:41055467010Contents:1 x Weight: hp black | 30,25 mm | 70 mm | 25 mm: 116 g 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