PF30 OSBB is the Specialized standard. The CeramicSpeed Shimano-compatible Bottom Bracket increases efficiency, durability, and reduces creaking. It also works with FSA and other 24mm diameter thru-axle cranks.The kit consists of two cups with CeramicSpeed Bearings installed. There are two variants. Both Standard and Coated Bearings feature super smooth CeramicSpeed Balls and hardened-steel races. The Coated have an additional feature: a 3-micron thick metallic layer over the races.The layer further smooths and hardens the steel, lowering drag and increasing life.In The Box1 bottom bracket with bearings installed.2 dust covers.10ml syringe of All Round Grease.Sticker sheet.