ITEM NAME:Deadly Bike Fixed Gear Bicycle Bb Thread Press-In Central Axis Ceramics Bea D7Q8 Deadly Bike Fixed Gear Bicycle Bb Thread Press-In Central Axis Ceramics Bea D7Q8 Name: Bicycle shaft bearing The inner ball is made of black ceramic, the friction system is low, more lubricated and more durable. Size: outer diameter 30mm* inner diameter 17mm* height 7mm Imported black pottery, low temperature sintering, higher strength, lubrication, wear resistance and longevity Color: silver Material: stainless steel + ceramic Package Content: 1* Ceramic Bearing
