DESCRIPTION & MATERIALS - Forged hollow SCM4130 chromo spindle - Industrial 6002KRS cartridge sealed bearings with oversized 3/16 balls - Cold forged steel cups - Double Snap seals for water and dirt protection Not sure which one you need? Try the FSA Easy BB Tool here; http://www.fsaeasybottombrackets.com/ FSA Part Numbers 210-3508 210-3513 210-3514 210-3533 210-3534 SIZES - 68mm x 108mm, 113mm, 118mm FINISH - Cups: Chrome plated, Sleeve: Zinc plated WEIGHT - 335 g