Tissting Bike Bottom Bracket 68mm Steel Hole Aix Bike Parts for Square Tapered Spindle Crank Waterproof Bicycle Axle Sealed with Screw(124mm)Specification: Material: Steel Weight: 11: Approx.345g / 12.2oz 12: Approx.340g / 12oz 13: Approx.324g / 11.4oz 14: Approx.329g / 11.6oz 15:Approx.349g / 11.2oz Size: 11: Approx.122.5*68mm / 4.8*2.7in 12:Appro..