1、CNC turning, quenching and hardening heat treatment, durable. 2、Five‑in‑one function, covering most of the common all‑in‑one shaft scale models. 3、High‑strength chromium‑molybdenum steel, high density, high hardness, quenching and hardening heat treatment. 4、CNC high‑precision turning, lead angle grinding and polishing treatment, no damage to the middle shaft or hands. 5、Five in one multi‑function, suitable for FSA‑386/for DUB16T/for BB‑9100/for BBR‑60/for BB4 6、The tooth form is precise and uniform, and the teeth are synchronized with the bottom bracket and exert force at the same time. 1 x 5 in 1 Bottom Bracket Sleeve Condition: 100% brand newItem type: 5 in 1 Bottom Bracket SleeveMaterial: Chrome-molybdenum steelColor: As picture shownOne size size: Approx. 5.5x 5.5cm/ 2.2x 2.2inThe other side size: Approx. 4.5x 4.5cm/ 1.8x 1.8inHeight: Approx. 3.5cm/ 1.4inWeight: Approx. 226g Process: quenching heat treatmentSuitable specifications: 1. Hollowtech: 16 teeth nick 44mm OD cupSuitable: suitable for many external thread types 2.For DUB: 12 teeth 46mm outer diameter cup 3.For BBR60: 16 teeth 41mm outer diameter cup 4.For BB9000: 16 teeth nick 39 mm outer diameter cup 5. For FSA386: 16-tooth nick 49mmOD 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.