Product Description Spare bearing for replacing the bearings of Hope 1 1/8" Ahead upper headset cups. Specifications:Dimensions (Inner x Outer x Width):30 mm x 41 mm x 6.5 mmDesignation:ACBModels:Design:Angular contact ball bearingRecommended Use:headsetBall Material:stainless steelSeals:both sidesManufacturer Number:HS123 Contents:1 x Hope spare bearing Manufacturer: Hope Mill Calf Hall Road Barnoldswick Lancashire BB18 5PX United Kingdom info@hopetech.com Distributor: bc GmbH Carlo-Schmid-Straße 12 52146 Würselen Germany info@bike-components.de