Product review (4 stars): Exact replacement bottom tray wheel, for better or worse
This is an essential replacement part if you have a Bosch dishwasher that needs one of these.  There are 8 on the bottom tray and with even one missing, the tray will jump the track.  This gets so tedious that you will eventually need to replace the missing one.  Even with all 8, you need to be calm and gentle when pulling out the bottom tray or it will jump off anyway!  I gave 4 out of 5 because the design is such that it is possible to lose one of these wheels when the tray jumps off the rails due to the side forces.  I suppose my dog ate the one that got lost because I never found it and hence had to order this one.  A little better engineering and maybe they could be made to hold on to the tray better.  But this is an exact replacement, so this complaint would be better directed to Bosch in Germany, and I'm not going there (literally or figuratively).