Upgrade 4 Pack Guide Wheels with 2 Pulley Gears, Part Number 3884997-R6, Replacement Compatible with Maytronics Dolphin, Nautilus CC Plus Automatic Robotic Pool Cleaner M200/M400/M500 &Dx3/Dx4/Dx6

Note: Nautilus CC, Nautilus CC Plus, Nautilus CC Pro or Nautilus CC Supreme are not supported for this part.Product Overview: You will get 4 guide wheels and 2 pulley gear...