For use on all Model C, D, E and Dynamic Indoor Rowers as well as all SkiErgs. This is the rubber bearing cup that holds the R8 bearing on indoor rowers (part number 232, sold separately) and the 12mm bearing on SkiErgs. See more info.
This is the 1/4-20 heavy Nylock nut that is used with the wooden handle that came standard on the Model A, B and C Indoor Rowers. The corresponding U-bolt is part number 244. Order two per handle.