Bearing is packed with heavy duty premium marine grease and with the addition of special complex thickeners which allows it to be virtually waterproof Nitrile butadiene rubber double-lip oil seals help prevent abrasives, corrosive moisture and other harmful contaminants from entering bearings To further help keep any moisture out, we have gone from 30% grease filling to a 60% for harsh conditions The special v-groove on the inner race is better for resistance to water intrusion Provides unsurpassed rust and corrosion protection Factory-Links ball bearings are specially designed for Off-Road use. - Suzuki DR-Z 400 (2006, 2011, 2005, 2001, 2004, 2012, 2015, 2000, 2008, 2010, 2014, 2007, 2003, 2009, 2013, 2002, 2016); Suzuki DR-Z 400 S (2017, 2019, 2018, 2015, 2016); Suzuki DR-Z 400 SM (2005, 2007, 2015, 2018, 2008, 2010, 2011, 2013, 2016, 2006, 2012, 2019, 2009, 2017, 2014)