Product Description Technical Information:Mount:hex boltsDiameter:34.9 mm, 36.4 mm, 38.6 mm, 39.7 mmMaterial:aluminium (6061-T6)Features:seatpost clamp with bolt for your mountain bikeminimalist designmade of 6061-T6 aluminiumwide gap for easy assembly without dismantling the dropper post cablestainless steel hex boltSize Guide:34.9 mm:fits most frames with 30.9 mm seat post diameter36.4 mm:fits most frames with 31.6 mm seat post diameter38.6 mm:fits most Specialized frames with rear shock39.7 mm:fits most Trek frames with rear shockContents:1 x 1 x hex bolt Weight: burgtec black | 34.9 mm: 22 g Manufacturer: Burgtec Unit 8 Leekbrook Way Leek Staffordshire ST13 7AP United Kingdom info@burgtec.co.uk Distributor: bc GmbH Carlo-Schmid-Straße 12 52146 Würselen Germany info@bike-components.de