Maytronics Dolphin 9985006-R2 Gray Timing TracksThe Maytronics 9985006 is a set of grey replacement timing tracks, identified by part number 9985006 R2, for Dolphin robotic pool cleaners. Constructed from durable rubber, these tracks come in a pack of two and feature a flat bar design on the inside. Compatible models include the Dolphin Nautilus, Nautilus CC Plus, Wave 60, Wave 75, Wave 80, Wave 100, Wave 120, Dolphin C3, and additional systems such as the Prowler 820 830 and Wave 2X2 GYRO.