Warranty and Return policy:
Rubber Seals on Cup to ease noise problem, if they make it too tight, U can remove the seals Press Fit 30, PF30, PF4630 , BB 386 EVO, BBright Bearing Cups are made of 6061 T6 Anodized Aluminum Alloy Information about Ceramics bearing: Bearing Material: Chrome Steel 52100 Ball Material: Nitrided Silicon Ceramic SI3N4 Enclosure: 2 Rubber Seals |