World Champion ACER Racing 5x11x4mm Ball Bearing with dual PTFE
seals. 10 pieces as shown.  These are 5x11mm ball bearings also known as a size MR115 ball bearing, Traxxas 5116 ball bearing or Tamiya 1150 bearing. HSR cage technology and sealed on both sides.  Super fast and super smooth action. Price is for ten 5x11x4mm ball bearings as shown in the photo. Can be used in any application that requires a 5x11x4mm bearing.