Dolphin Advantage Yellow Track #9985050 Fits the following Maytronics Dolphin Robotic Cleaners ONLY: Advantage 9999301, Advantage RC 9999301RC, 3001 9999321, 3001 9999321-BL, 3001 9999323-BL, 2002 9999331, 2002 9999334 Heavy Duty 9999389-HD, Heavy Duty 9999389-BL4, Interactive 9999301-INT, Deluxe 9999301-DLX, Deluxe Cl1 9999311-DLX This price includes ONE Track only - if you need both sides, you will need to order a quantity of TWO (2) Please note, the inside of these tracks have small rounded nubs as shown in the picture Please make sure your pool cleaner is on the list above. If it is not, this will not fit and you are responsible for return shipping.