Features1CNC turning, quenching and hardening heat treatment, durable. 2Fiveinone function, covering most of the common allinone shaft scale models. 3Highstrength chromiummolybdenum steel, high density, high hardness, quenching and hardening heat treatment. 4CNC highprecision turning, lead angle grinding and polishing treatment, no damage to the middle shaft or hands. 5Five in one multifunction, suitable for FSA386/for DUB16T/for BB9100/for BBR60/for BB44. 6The tooth form is precise and uniform, and the teeth are synchronized with the bottom bracket and exert force at the same time.SpecificationItem type:5 in 1 Bottom Bracket SleeveMaterial:Chrome-molybdenum steelColor: As picture shownOne size size: Approx. 5.5x5.5cm/2.2x2.2inThe other side size: Approx. 4.5x4.5cm/1.8x1.8inHeight: Approx. 3.5cm/1.4inWeight: Approx. 226gProcess: quenching heat treatmentSuitable specifications:1. Hollowtech: 16 teeth nick44mm OD cupSuitable: suitable for many external thread types2.For DUB: 12 teeth 46mm outer diameter cup3.For BBR60: 16 teeth 41mm outer diameter cup4.For BB9000: 16 teeth nick39 mm outer diameter cup5. For FSA386: 16-tooth nick49mmOD cupFeatures: chromium-molybdenum steel, high hardness, CNC turning, high accuracy, Guorun does not hurt your hands, 5 in 1 function, durable, quenching and hardening heat treatment.Package List1 x5 in 1 Bottom Bracket Sleeve