This bike bottom bracket set is constructed from durable steel and features a classic black finish, weighing approximately 250g. It includes essential components such as one axle stick, two screws, one ring, two bowls, and two ball bearing retainers, providing a complete solution for your bicycle. Designed for mountain bikes, this fixed steel crank square hole bottom bracket with cycling bearing cages is available in various sizes, including 3S, 3T, 3P, and 5S, with whole lengths ranging from 14cm to 14.8cm to ensure a proper fit for your bike. Constructed from durable steel material. Designed as a fixed steel crank square hole bottom bracket. Features cycling bearing cages for smooth operation. Specifically engineered for use with MTB (Mountain Bike) bicycles. Available in a black finish.