Features： 1、STRONG SEALING: Bike hubs are sealed to effectively isolate water, dirt and grime and achieve a smoothly and fast riding experience. 2、INBUILT BEARING: Bike hubs 32 hole built in bearing, smoothly more effort, using the first two after four bearing layout, riding more effort. 3、ANODIZING PROCESS: Mountain bike hubs use anodizing process to improve wear resistance, electrical conductivity, reflectivity and aesthetic enhancement. 4、CNC CUTTING PROCESS: Bike hubs use CNC cutting process, high accuracy, stable performance and low friction. 5、ALUMINUM ALLOY: Bicycle hubs are made of aluminum alloy material, high strength, no rust, no deformation, durable. Specification： Item Type: 32 Hole Mountain Bike Hub Material: Aluminum Alloy Size: Approx. 15 x 110mm / ​0.6 x 4.3in Color: Red Package List： 1 x 32 Hole Mountain Bike Hub