... PTFE/fibre dry bearings (without lead), steel bronze powder marginal bearings (with POM, with PVDF, with PEEK/PTFE), metal with PTFE layer dry bearings, metal ... mesh with PTFE layer bearings, bronze powder with PTFE tape bearings, steel with PTFE ... , bronze wrapped bearings with through holes, metal backed with bronze alloy graphite oilless bearings, ...