The xAxis Sealed Flex Joint is a technology step-up for suspension joints and linkages. xAxis delivers reduced compliance vs rubber improved durability vs spherical bearings, and increased angularity vs urethane. Featuring sealed ends to keep grease in and contaminants out, a highly polished ball, and 36deg of articulation this cross axis ball joint will meet the most demanding requirements. Build your next link with this 12mm x 57mm x 40mm xAxis or use it to upgrade your p/n 72110 BMW rear control arm. California Residents WARNING