Vitus H5ER Shimano Microspline Freehub BodyThis freehub body is specifically designed to fit all Vitus MTB H5ER rear hubs with Shimano 12 speed Microspline.Features: Compatibility: All Vitus MTB H5ER Rear Hub with Shimano 12 speed Microspline Part Number: H5ERBuy Vitus Wheels & Tyres from Chain Reaction Cycles, the World’s Largest Online Bike Store.