The bicycle BB axle is made from durable and robust steel. With a wealth of expertise, our manufacturing facility boasts extensive experience in the production of BB axles. Our commitment to quality and precision ensures that each axle meets the highest standards in the cycling industry. · QTY: 50 SETS/CTN. · N.W/G.W.: 17/18KGS. · MEAS: 31X23X23CM. Xingtai Yiming Bicycle Co.,Ltd is a factory specialized in manufacturing Bicycle Pump, Bicycle brake cable, bicycle saddles. we welcome your inquiry.