Description: Bicycle bottom bearing bracket is a great accessory. It is made of Aluminum, this will be more durable. Designed with integrated sleeve and inside bearing to make sure the bearing rotate stably. Positive thread dust-proof design, which will help to prevent the erosion of sediment water. Full range of specifications, can satisfy most of the user base. Features: Made of Aluminum, this will be more durable. Designed with integrated sleeve and inside bearing to make sure the bearing rotate stably. Double waterproof, dust bearing and bearing shield, which can help to prevent the erosion of sediment water. Axial strength HCR60 in line with EU standards. Use US Naraku paint to prevent the screw loose and slip teeth. Integrated structure with no gaps to prevent the assembly stuck, stuck coaxial abnormal anomalies, safe for use. Full range of specifications, can satisfy most of the user base. Specifications: Product Name: Bearing Axis Material: Aluminum Color: Blue & Sliver & Black Five-way : For 68MM Five-way Dimension: Approx. 29 x 116mm/1.1 x 4.6in Weight: Approx. 311~334g Package Included: 1 x Bottom Bearing Axis 2 x Waterproof Screws Please Note: 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displaye d in photos may be showing slightly different from the real object. Please in kind prevail. .