Product Description Superlight ACB (angular contact bearing) bearing. Inexpensive tuning part with aluminium housing in 45° x 45°. Specifications:Dimensions (Inner x Outer x Width):40 mm x 52 mm x 7 mmDesignation:MR128RModels:universal: Design:angular contact ballRecommended Use:headsetBall Material:steel (CrMo)Inner Race Material:steel (SUJ2)Outer Race Material:steel (SUJ2)Seals:single (black seal)Features:Type TH-070R35 ball bearings45°/45° anglefor 1.5" headsetsfor Campagnolo standardManufacturer Number:160-1653 Contents:1 x FSA TH-070R MR128R bearing Weight: universal | MR128R: 23 g Manufacturer: F.S.A. S.R.L. Via Francesco Petrarca. 4 20123 Milan Italy info@fullspeedahead.com