Velox bar plugs: no more lost plugs and no more bruised knees. Soft black rubber. These are for road bars, not MTB size bars. Note that they don't work with VO bars without modification - the plugs are a bit too big. You can grind them down to make them fit, but it's a bit of a chore. Use them with Nitto, and others, though.
Sold as a pair.