This is a mountain bike freehub body made of aluminum alloy, compatible with 8, 9, 10, and 11 speed cassettes. It features a durable construction and is designed for use on mountain bikes. The freehub body has 4 or 6 pawls and comes with 2 bearings. It is available in different axis diameters, including 12mm, 15mm, and 17mm. The weight of the freehub body varies depending on the axis diameter, ranging from 80g to 94g. The product is packaged as a single piece and is ready for installation on your mountain bike.