PREMIUM MATERIALThe bicycle bottom bracket is made of metal material, and this bottom bracket is solid and durable with a long srvice time.Don't miss it, worth your buying! FINE WORKMANSHIPMetal bicycle bottom bracket has fine workmanship and clear thread, different parts connect closely.It is suitable for the thread of 1.37 with an inner diameter of 24mm(0.9 in). PLEASE TO NOTEOur thread type bottom brackets are divided into left and right parts, R stands for right side, L stands for left side, please pay attention to the distinction when installing. SMALL SIZE AND LIGHTWEIGHTBike bottom bracket is small size and lightweight, easy to carry and store, convenient to use.The bearing is accurate and not loose, assure that the center of the circle is consistent when turning. STURDY AND DURABLEThe bottom bracket is sturdy and durable and has a long service life. Fine workmanship, small size error. For safety, please use the BB tool to install and replace the bottom bracket. Product Description Demeras is a Chinese company that has formed a diversified product line with outdoor sports as the core, aiming to provide people with more high-quality products, encourage people to go outdoors and embrace a happy, healthy, and active lifestyle. Read more