The Zimmermann brake drum is an OE-Quality replacement and is an original equipment supplier to many European automotive manufacturers. To prevent rust during storage and use, Zimmermann's Coat Z coating keeps the outer hub rust-free and looking great over the long term. Product Features:OE-Equivalent and Direct fit ApplicationMade exclusively of high-grade cast ironImmediate functional capability without removal of the coating before mountingGerman production meeting the requirements of actual Quality Management SystemsWell known, highest Otto-Zimmermann-Product-QualityNo rust formationSignificant improvement in appearanceCorrosion protection during storage and installationReady to mount: the coating in the hub is as thin as possibleImmediate and full functionality